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Preview: Recent Articles in Phys. Rev. Lett.

Recent Articles in Phys. Rev. Lett.

Recent articles in Physical Review Letters

Published: 2017-12-15T01:02:46+00:00


Essentially Entropic Lattice Boltzmann Model


Author(s): Mohammad Atif, Praveen Kumar Kolluru, Chakradhar Thantanapally, and Santosh Ansumali

The entropic lattice Boltzmann model (ELBM), a discrete space-time kinetic theory for hydrodynamics, ensures nonlinear stability via the discrete time version of the second law of thermodynamics (the $H$ theorem). Compliance with the $H$ theorem is numerically enforced in this methodology and involv...

[Phys. Rev. Lett. 119, 240602] Published Thu Dec 14, 2017

Observation of Top Quark Production in Proton-Nucleus Collisions


Author(s): A. M. Sirunyan et al. (CMS Collaboration)

The top quark—previously seen in proton collisions—has now been identified in collisions between protons and lead nuclei.

[Phys. Rev. Lett. 119, 242001] Published Thu Dec 14, 2017

Navigating at Will on the Water Phase Diagram


Author(s): S. Pipolo, M. Salanne, G. Ferlat, S. Klotz, A. M. Saitta, and F. Pietrucci

Despite the simplicity of its molecular unit, water is a challenging system because of its uniquely rich polymorphism and predicted but yet unconfirmed features. Introducing a novel space of generalized coordinates that capture changes in the topology of the interatomic network, we are able to syste...

[Phys. Rev. Lett. 119, 245701] Published Thu Dec 14, 2017

Covariant Conservation Laws and the Spin Hall Effect in Dirac-Rashba Systems


Author(s): Mirco Milletarì, Manuel Offidani, Aires Ferreira, and Roberto Raimondi

We present a theoretical analysis of two-dimensional Dirac-Rashba systems in the presence of disorder and external perturbations. We unveil a set of exact symmetry relations (Ward identities) that impose strong constraints on the spin dynamics of Dirac fermions subject to proximity-induced interacti...

[Phys. Rev. Lett. 119, 246801] Published Thu Dec 14, 2017

Extracellular Processing of Molecular Gradients by Eukaryotic Cells Can Improve Gradient Detection Accuracy


Author(s): Igor Segota and Carl Franck

Eukaryotic cells sense molecular gradients by measuring spatial concentration variation through the difference in the number of occupied receptors to which molecules can bind. They also secrete enzymes that degrade these molecules, and it is presently not well understood how this affects the local g...

[Phys. Rev. Lett. 119, 248101] Published Thu Dec 14, 2017

Cascading Failures as Continuous Phase-Space Transitions


Author(s): Yang Yang and Adilson E. Motter

In network systems, a local perturbation can amplify as it propagates, potentially leading to a large-scale cascading failure. Here we derive a continuous model to advance our understanding of cascading failures in power-grid networks. The model accounts for both the failure of transmission lines an...

[Phys. Rev. Lett. 119, 248302] Published Thu Dec 14, 2017

Spin Entanglement Witness for Quantum Gravity


Author(s): Sougato Bose, Anupam Mazumdar, Gavin W. Morley, Hendrik Ulbricht, Marko Toroš, Mauro Paternostro, Andrew A. Geraci, Peter F. Barker, M. S. Kim, and Gerard Milburn

Two proposals describe how to test whether gravity is inherently quantum by measuring the entanglement between two masses.

[Phys. Rev. Lett. 119, 240401] Published Wed Dec 13, 2017

Gravitationally Induced Entanglement between Two Massive Particles is Sufficient Evidence of Quantum Effects in Gravity


Author(s): C. Marletto and V. Vedral

Two proposals describe how to test whether gravity is inherently quantum by measuring the entanglement between two masses.

[Phys. Rev. Lett. 119, 240402] Published Wed Dec 13, 2017

Estimating the Error of an Analog Quantum Simulator by Additional Measurements


Author(s): Iris Schwenk, Sebastian Zanker, Jan-Michael Reiner, Juha Leppäkangas, and Michael Marthaler

We study an analog quantum simulator coupled to a reservoir with a known spectral density. The reservoir perturbs the quantum simulation by causing decoherence. The simulator is used to measure an operator average, which cannot be calculated using any classical means. Since we cannot predict the res...

[Phys. Rev. Lett. 119, 240502] Published Wed Dec 13, 2017

Effective Thermodynamics for a Marginal Observer


Author(s): Matteo Polettini and Massimiliano Esposito

Thermodynamics is usually formulated on the presumption that the observer has complete information about the system he or she deals with: no parasitic current, exact evaluation of the forces that drive the system. For example, the acclaimed fluctuation relation (FR), relating the probability of time...

[Phys. Rev. Lett. 119, 240601] Published Wed Dec 13, 2017

SU(5) Unification without Proton Decay


Author(s): Bartosz Fornal and Benjamín Grinstein

We construct a four-dimensional SU(5) grand unified theory in which the proton is stable. The standard model leptons reside in the 5 and 10 irreps of SU(5), whereas the quarks live in the 40 and 50 irreps. The SU(5) gauge symmetry is broken by the vacuum expectation values of the scalar 24 and 75 ir...

[Phys. Rev. Lett. 119, 241801] Published Wed Dec 13, 2017

Hartree and Exchange in Ensemble Density Functional Theory: Avoiding the Nonuniqueness Disaster


Author(s): Tim Gould and Stefano Pittalis

Ensemble density functional theory is a promising method for the efficient and accurate calculation of excitations of quantum systems, at least if useful functionals can be developed to broaden its domain of practical applicability. Here, we introduce a guaranteed single-valued “Hartree-exchange” en...

[Phys. Rev. Lett. 119, 243001] Published Wed Dec 13, 2017

Symmetry Breaking and Strong Persistent Plasma Currents via Resonant Destabilization of Atoms


Author(s): C. Brée, M. Hofmann, A. Demircan, U. Morgner, O. Kosareva, A. Savel’ev, A. Husakou, M. Ivanov, and I. Babushkin

The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman resonances). This process is most prominent in the multiphoton ionization regime, meaning that the ionization event takes many optical cycles. Neverthel...

[Phys. Rev. Lett. 119, 243202] Published Wed Dec 13, 2017

Laser-Induced Inelastic Diffraction from Strong-Field Double Ionization


Author(s): Wei Quan, XiaoLei Hao, XiaoQing Hu, RenPing Sun, YanLan Wang, YongJu Chen, ShaoGang Yu, SongPo Xu, ZhiLei Xiao, XuanYang Lai, XingYu Li, Wilhelm Becker, Yong Wu, JianGuo Wang, XiaoJun Liu, and Jing Chen

In this Letter, we propose a novel laser-induced inelastic diffraction (LIID) scheme based on the intense-field-driven atomic nonsequential double ionization (NSDI) process and demonstrate that, with this LIID approach, the doubly differential cross sections (DDCSs) of the target ions, e.g., ${\math...

[Phys. Rev. Lett. 119, 243203] Published Wed Dec 13, 2017

High-$Q$ Supercavity Modes in Subwavelength Dielectric Resonators


Author(s): Mikhail V. Rybin, Kirill L. Koshelev, Zarina F. Sadrieva, Kirill B. Samusev, Andrey A. Bogdanov, Mikhail F. Limonov, and Yuri S. Kivshar

Recent progress in nanoscale optical physics is associated with the development of a new branch of nanophotonics exploring strong Mie resonances in dielectric nanoparticles with a high refractive index. The high-index resonant dielectric nanostructures form building blocks for novel photonic metadev...

[Phys. Rev. Lett. 119, 243901] Published Wed Dec 13, 2017

Nonlinear Stimulated Raman Exact Passage by Resonance-Locked Inverse Engineering


Author(s): V. Dorier, M. Gevorgyan, A. Ishkhanyan, C. Leroy, H. R. Jauslin, and S. Guérin

We derive an exact and robust stimulated Raman process for nonlinear quantum systems driven by pulsed external fields. The external fields are designed with closed-form expressions from the inverse engineering of a given efficient and stable dynamics. This technique allows one to induce a controlled...

[Phys. Rev. Lett. 119, 243902] Published Wed Dec 13, 2017

Chimera States in Continuous Media: Existence and Distinctness


Author(s): Zachary G. Nicolaou, Hermann Riecke, and Adilson E. Motter

The defining property of chimera states is the coexistence of coherent and incoherent domains in systems that are structurally and spatially homogeneous. The recent realization that such states might be common in oscillator networks raises the question of whether an analogous phenomenon can occur in...

[Phys. Rev. Lett. 119, 244101] Published Wed Dec 13, 2017

Distribution of Off-Diagonal Cross Sections in Quantum Chaotic Scattering: Exact Results and Data Comparison


Author(s): Santosh Kumar, Barbara Dietz, Thomas Guhr, and Achim Richter

The exact distribution of the experimentally inaccessible off-diagonal cross sections of scattering in quantum chaotic systems are calculated analytically, solving an old problem in compound nucleus scattering.

[Phys. Rev. Lett. 119, 244102] Published Wed Dec 13, 2017

Saturation of the Hosing Instability in Quasilinear Plasma Accelerators


Author(s): R. Lehe, C. B. Schroeder, J.-L. Vay, E. Esarey, and W. P. Leemans

The beam hosing instability is analyzed theoretically for a witness beam in the quasilinear regime of plasma accelerators. In this regime, the hosing instability saturates, even for a monoenergetic bunch, at a level much less than standard scalings predict. Analytic expressions are derived for the s...

[Phys. Rev. Lett. 119, 244801] Published Wed Dec 13, 2017

Complete Many-Body Localization in the $t\text{−}J$ Model Caused by a Random Magnetic Field


Author(s): Gal Lemut, Marcin Mierzejewski, and Janez Bonča

The many body localization (MBL) of spin-$\frac{1}{2}$ fermions poses a challenging problem. It is known that the disorder in the charge sector may be insufficient to cause full MBL. Here, we study dynamics of a single hole in one dimensional $t\text{−}J$ model subject to a random magnetic field. We...

[Phys. Rev. Lett. 119, 246601] Published Wed Dec 13, 2017

Instability of Insulators near Quantum Phase Transitions


Author(s): A. Doron, I. Tamir, T. Levinson, M. Ovadia, B. Sacépé, and D. Shahar

Thin films of amorphous indium oxide undergo a magnetic field driven superconducting to insulator quantum phase transition. In the insulating phase, the current-voltage characteristics show large current discontinuities due to overheating of electrons. We show that the onset voltage for the disconti...

[Phys. Rev. Lett. 119, 247001] Published Wed Dec 13, 2017

Dirac and Nodal Line Magnons in Three-Dimensional Antiferromagnets


Author(s): Kangkang Li, Chenyuan Li, Jiangping Hu, Yuan Li, and Chen Fang

We study the topological properties of magnon excitations in three-dimensional antiferromagnets, where the ground state configuration is invariant under time reversal followed by space inversion ($PT$ symmetry). We prove that Dirac points and nodal lines, the former being the limiting case of the la...

[Phys. Rev. Lett. 119, 247202] Published Wed Dec 13, 2017

Real-Space Imaging of the Tailored Plasmons in Twisted Bilayer Graphene


Author(s): F. Hu, Suprem R. Das, Y. Luan, T.-F. Chung, Y. P. Chen, and Z. Fei

We report a systematic plasmonic study of twisted bilayer graphene (TBLG)—two graphene layers stacked with a twist angle. Through real-space nanoimaging of TBLG single crystals with a wide distribution of twist angles, we find that TBLG supports confined infrared plasmons that are sensitively depend...

[Phys. Rev. Lett. 119, 247402] Published Wed Dec 13, 2017

Clogging Transition of Vibration-Driven Vehicles Passing through Constrictions


Author(s): G. A. Patterson, P. I. Fierens, F. Sangiuliano Jimka, P. G. König, A. Garcimartín, I. Zuriguel, L. A. Pugnaloni, and D. R. Parisi

We report experimental results on the competitive passage of elongated self-propelled vehicles rushing through a constriction. For the chosen experimental conditions, we observe the emergence of intermittencies similar to those reported previously for active matter passing through narrow doors. Note...

[Phys. Rev. Lett. 119, 248301] Published Wed Dec 13, 2017

Magnetic Monopole Mass Bounds from Heavy-Ion Collisions and Neutron Stars


Author(s): Oliver Gould and Arttu Rajantie

A new analysis places some of the tightest bounds yet on the mass that magnetic monopoles should have if they exist.

[Phys. Rev. Lett. 119, 241601] Published Tue Dec 12, 2017

Equation of Motion for a Grain Boundary


Author(s): Luchan Zhang, Jian Han, Yang Xiang, and David J. Srolovitz

Grain boundary (GB) migration controls many forms of microstructural evolution in polycrystalline materials. Recent theory, simulations, and experiments demonstrate that GB migration is controlled by the motion of discrete line defects or disconnections. We present a continuum equation of motion for...

[Phys. Rev. Lett. 119, 246101] Published Tue Dec 12, 2017

Realization of a Quantum Random Generator Certified with the Kochen-Specker Theorem


Author(s): Anatoly Kulikov, Markus Jerger, Anton Potočnik, Andreas Wallraff, and Arkady Fedorov

Random numbers are required for a variety of applications from secure communications to Monte Carlo simulation. Yet randomness is an asymptotic property, and no output string generated by a physical device can be strictly proven to be random. We report an experimental realization of a quantum random...

[Phys. Rev. Lett. 119, 240501] Published Mon Dec 11, 2017

Direct Measurement of the Key ${E}_{\mathrm{c}.\mathrm{m}.}=456\text{ }\text{ }\mathrm{keV}$ Resonance in the Astrophysical $^{19}\mathrm{Ne}(p,γ)^{20}\mathrm{Na}$ Reaction and Its Relevance for Explosive Binary Systems


Author(s): R. Wilkinson, G. Lotay, A. Lennarz, C. Ruiz, G. Christian, C. Akers, W. N. Catford, A. A. Chen, D. Connolly, B. Davids, D. A. Hutcheon, D. Jedrejcic, A. M. Laird, L. Martin, E. McNeice, J. Riley, and M. Williams

We have performed a direct measurement of the $^{19}\mathrm{Ne}(p,γ)^{20}\mathrm{Na}$ reaction in inverse kinematics using a beam of radioactive $^{19}\mathrm{Ne}$. The key astrophysical resonance in the $^{19}\mathrm{Ne}+p$ system has been definitely measured for the first time at ${E}_{\mathrm{c}....

[Phys. Rev. Lett. 119, 242701] Published Mon Dec 11, 2017

Disentangling Intracycle Interferences in Photoelectron Momentum Distributions Using Orthogonal Two-Color Laser Fields


Author(s): Xinhua Xie (谢新华), Tian Wang, ShaoGang Yu, XuanYang Lai, Stefan Roither, Daniil Kartashov, Andrius Baltuška, XiaoJun Liu, André Staudte, and Markus Kitzler

We use orthogonally polarized two-color (OTC) laser pulses to separate quantum paths in the multiphoton ionization of Ar atoms. Our OTC pulses consist of 400 and 800 nm light at a relative intensity ratio of $10∶1$. We find a hitherto unobserved interference in the photoelectron momentum distributio...

[Phys. Rev. Lett. 119, 243201] Published Mon Dec 11, 2017

Epi-Two-Dimensional Fluid Flow: A New Topological Paradigm for Dimensionality


Author(s): Z. Yoshida and P. J. Morrison

While a variety of fundamental differences are known to separate two-dimensional (2D) and three-dimensional (3D) fluid flows, it is not well understood how they are related. Conventionally, dimensional reduction is justified by an a priori geometrical framework; i.e., 2D flows occur under some geome...

[Phys. Rev. Lett. 119, 244501] Published Mon Dec 11, 2017

Structural Origin of Enhanced Dynamics at the Surface of a Glassy Alloy


Author(s): Gang Sun, Shibu Saw, Ian Douglass, and Peter Harrowell

The enhancement of mobility at the surface of an amorphous alloy is studied using a combination of molecular dynamic simulations and normal mode analysis of the nonuniform distribution of Debye-Waller factors. The increased mobility at the surface is found to be associated with the appearance of Arr...

[Phys. Rev. Lett. 119, 245501] Published Mon Dec 11, 2017

Reflection-Symmetric Second-Order Topological Insulators and Superconductors


Author(s): Josias Langbehn, Yang Peng, Luka Trifunovic, Felix von Oppen, and Piet W. Brouwer

Theorists have discovered topological insulators that are insulating in their interior and on their surfaces but have conducting channels at corners or along edges.

[Phys. Rev. Lett. 119, 246401] Published Mon Dec 11, 2017

$(d−2)$-Dimensional Edge States of Rotation Symmetry Protected Topological States


Author(s): Zhida Song, Zhong Fang, and Chen Fang

Theorists have discovered topological insulators that are insulating in their interior and on their surfaces but have conducting channels at corners or along edges.

[Phys. Rev. Lett. 119, 246402] Published Mon Dec 11, 2017

Jammed Spin Liquid in the Bond-Disordered Kagome Antiferromagnet


Author(s): Thomas Bilitewski, Mike E. Zhitomirsky, and Roderich Moessner

We study a class of continuous spin models with bond disorder including the kagome Heisenberg antiferromagnet. For weak disorder strength, we find discrete ground states whose number grows exponentially with system size. These states do not exhibit zero-energy excitations characteristic of highly fr...

[Phys. Rev. Lett. 119, 247201] Published Mon Dec 11, 2017

Harmonic Quantum Coherence of Multiple Excitons in PbS/CdS Core-Shell Nanocrystals


Author(s): Hirokazu Tahara, Masanori Sakamoto, Toshiharu Teranishi, and Yoshihiko Kanemitsu

The generation and recombination dynamics of multiple excitons in nanocrystals (NCs) have attracted much attention from the viewpoints of fundamental physics and device applications. However, the quantum coherence of multiple exciton states in NCs still remains unclear due to a lack of experimental ...

[Phys. Rev. Lett. 119, 247401] Published Mon Dec 11, 2017

Extensional Strain Hardening Induced by $π\text{−}π$ Interactions in Barely Entangled Polymer Chains: The Curious Case of Poly(4-vinylbiphenyl)


Author(s): Carlos R. López-Barrón and Huaxing Zhou

Aromatic $π\text{−}π$ interactions between phenyl groups of adjacent chains in poly(4-vinylbiphenyl) (PVBP) have profound effects on the dynamics of this polymer. We report two unexpected nonlinear viscoelastic responses of PVBP when subjected to uniaxial flow. One is the unprecedented observation o...

[Phys. Rev. Lett. 119, 247801] Published Mon Dec 11, 2017

Generic Primary Mechanical Response of Viscous Liquids


Author(s): S. Peter Bierwirth, Roland Böhmer, and Catalin Gainaru

Four decades ago a seminal review by Jonscher [Nature (London) 267, 673 (1977)] revealed that the dielectric response of conducting materials is characterized by a “remarkable universality”. Demonstrating that the same response pattern is exhibited also by shear rheological spectra of nonpolymeric v...

[Phys. Rev. Lett. 119, 248001] Published Mon Dec 11, 2017

Demonstration of Two-Atom Entanglement with Ultrafast Optical Pulses


Author(s): J. D. Wong-Campos, S. A. Moses, K. G. Johnson, and C. Monroe

We demonstrate quantum entanglement of two trapped atomic ion qubits using a sequence of ultrafast laser pulses. Unlike previous demonstrations of entanglement mediated by the Coulomb interaction, this scheme does not require confinement to the Lamb-Dicke regime and can be less sensitive to ambient ...

[Phys. Rev. Lett. 119, 230501] Published Fri Dec 08, 2017

Large Longitudinal Spin Alignment of Excited Projectiles in Intermediate Energy Inelastic Scattering


Author(s): D. E. M. Hoff, R. J. Charity, K. W. Brown, C. D. Pruitt, L. G. Sobotka, T. B. Webb, G. Potel, B. Roeder, and A. Saastamoinen

We study the sequential breakup of $E/A=24.0\text{ }\text{ }\mathrm{MeV}$ $^{7}\mathrm{Li}$ projectiles excited through inelastic interactions with C, Be, and Al target nuclei. For peripheral events that do not excite the target, we find very large spin alignment of the excited $^{7}\mathrm{Li}$ pro...

[Phys. Rev. Lett. 119, 232501] Published Fri Dec 08, 2017

Observation of Terahertz Radiation via the Two-Color Laser Scheme with Uncommon Frequency Ratios


Author(s): Liang-Liang Zhang, Wei-Min Wang, Tong Wu, Rui Zhang, Shi-Jing Zhang, Cun-Lin Zhang, Yan Zhang, Zheng-Ming Sheng, and Xi-Cheng Zhang

In the widely studied two-color laser scheme for terahertz (THz) radiation from a gas, the frequency ratio of the two lasers is usually fixed at ${ω}_{2}/{ω}_{1}=1:2$. We investigate THz generation with uncommon frequency ratios. Our experiments show, for the first time, efficient THz generation wit...

[Phys. Rev. Lett. 119, 235001] Published Fri Dec 08, 2017

Melde’s Experiment on a Vibrating Liquid Foam Microchannel


Author(s): Alexandre Cohen, Nathalie Fraysse, and Christophe Raufaste

A liquid microchannel—the line where three soap films meet—vibrates like a string whose diameter shrinks as the shaking force increases.

[Phys. Rev. Lett. 119, 238001] Published Fri Dec 08, 2017

Observation of a Degenerate Fermi Gas Trapped by a Bose-Einstein Condensate


Author(s): B. J. DeSalvo, Krutik Patel, Jacob Johansen, and Cheng Chin

A Bose-Einstein condensate can act as a stable trap for a gas of fermions.

[Phys. Rev. Lett. 119, 233401] Published Thu Dec 07, 2017

Bounding the Set of Classical Correlations of a Many-Body System


Author(s): Matteo Fadel and Jordi Tura

We present a method to certify the presence of Bell correlations in experimentally observed statistics, and to obtain new Bell inequalities. Our approach is based on relaxing the conditions defining the set of correlations obeying a local hidden variable model, yielding a convergent hierarchy of sem...

[Phys. Rev. Lett. 119, 230402] Published Wed Dec 06, 2017

Probing the Bond Order Wave Phase Transitions of the Ionic Hubbard Model by Superlattice Modulation Spectroscopy


Author(s): Karla Loida, Jean-Sébastien Bernier, Roberta Citro, Edmond Orignac, and Corinna Kollath

An exotic phase, the bond order wave, characterized by the spontaneous dimerization of the hopping, has been predicted to exist sandwiched between the band and Mott insulators in systems described by the ionic Hubbard model. Despite growing theoretical evidence, this phase still evades experimental ...

[Phys. Rev. Lett. 119, 230403] Published Wed Dec 06, 2017

Three-Dimensional Localized-Delocalized Anderson Transition in the Time Domain


Author(s): Dominique Delande, Luis Morales-Molina, and Krzysztof Sacha

Systems which can spontaneously reveal periodic evolution are dubbed time crystals. This is in analogy with space crystals that display periodic behavior in configuration space. While space crystals are modeled with the help of space periodic potentials, crystalline phenomena in time can be modeled ...

[Phys. Rev. Lett. 119, 230404] Published Wed Dec 06, 2017

Three-Dimensional General-Relativistic Magnetohydrodynamic Simulations of Remnant Accretion Disks from Neutron Star Mergers: Outflows and $r$-Process Nucleosynthesis


Author(s): Daniel M. Siegel and Brian D. Metzger

New calculations show that the accretion flows that form after a neutron star collision can eject large amounts of matter rich in gold and other heavy elements.

[Phys. Rev. Lett. 119, 231102] Published Wed Dec 06, 2017

Phase Stochastic Resonance in a Forced Nanoelectromechanical Membrane


Author(s): Avishek Chowdhury, Sylvain Barbay, Marcel G. Clerc, Isabelle Robert-Philip, and Rémy Braive

Stochastic resonance is a general phenomenon usually observed in one-dimensional, amplitude modulated, bistable systems. We show experimentally the emergence of phase stochastic resonance in the bidimensional response of a forced nanoelectromechanical membrane by evidencing the enhancement of a weak...

[Phys. Rev. Lett. 119, 234101] Published Wed Dec 06, 2017

Dynamo Enhancement and Mode Selection Triggered by High Magnetic Permeability


Author(s): S. Kreuzahler, Y. Ponty, N. Plihon, H. Homann, and R. Grauer

We present results from consistent dynamo simulations, where the electrically conducting and incompressible flow inside a cylinder vessel is forced by moving impellers numerically implemented by a penalization method. The numerical scheme models jumps of magnetic permeability for the solid impellers...

[Phys. Rev. Lett. 119, 234501] Published Wed Dec 06, 2017

Emergence of Non-Abelian Magnetic Monopoles in a Quantum Impurity Problem


Author(s): E. Yakaboylu, A. Deuchert, and M. Lemeshko

Recently, it was shown that molecules rotating in superfluid helium can be described in terms of the angulon quasiparticles [Phys. Rev. Lett. 118, 095301 (2017)]. Here, we demonstrate that in the experimentally realized regime the angulon can be seen as a point charge on a two-sphere interacting wit...

[Phys. Rev. Lett. 119, 235301] Published Wed Dec 06, 2017

Full Counting Statistics for Interacting Fermions with Determinantal Quantum Monte Carlo Simulations


Author(s): Stephan Humeniuk and Hans Peter Büchler

We present a method for computing the full probability distribution function of quadratic observables such as particle number or magnetization for the Fermi-Hubbard model within the framework of determinantal quantum Monte Carlo calculations. Especially in cold atom experiments with single-site reso...

[Phys. Rev. Lett. 119, 236401] Published Wed Dec 06, 2017

Destabilization of Magnetic Order in a Dilute Kitaev Spin Liquid Candidate


Author(s): P. Lampen-Kelley, A. Banerjee, A. A. Aczel, H. B. Cao, M. B. Stone, C. A. Bridges, J.-Q. Yan, S. E. Nagler, and D. Mandrus

The insulating honeycomb magnet $α\text{−}{\mathrm{RuCl}}_{3}$ exhibits fractionalized excitations that signal its proximity to a Kitaev quantum spin liquid state; however, at $T=0$, fragile long-range magnetic order arises from non-Kitaev terms in the Hamiltonian. Spin vacancies in the form of ${\m...

[Phys. Rev. Lett. 119, 237203] Published Wed Dec 06, 2017

Helimagnon Resonances in an Intrinsic Chiral Magnonic Crystal


Author(s): Mathias Weiler, Aisha Aqeel, Maxim Mostovoy, Andrey Leonov, Stephan Geprägs, Rudolf Gross, Hans Huebl, Thomas T. M. Palstra, and Sebastian T. B. Goennenwein

We experimentally study magnetic resonances in the helical and conical magnetic phases of the chiral magnetic insulator ${\mathrm{Cu}}_{2}{\mathrm{OSeO}}_{3}$ at the temperature $T=5\text{ }\text{ }\mathrm{K}$. Using a broadband microwave spectroscopy technique based on vector network analysis, we i...

[Phys. Rev. Lett. 119, 237204] Published Wed Dec 06, 2017

Nanoscale Particle Motion in Attractive Polymer Nanocomposites


Author(s): Erkan Senses, Suresh Narayanan, Yimin Mao, and Antonio Faraone

Using x-ray photon correlation spectroscopy, we examined the slow nanoscale motion of silica nanoparticles individually dispersed in an entangled poly (ethylene oxide) melt at particle volume fractions up to 42%. The nanoparticles, therefore, serve as both fillers for the resulting attractive polyme...

[Phys. Rev. Lett. 119, 237801] Published Wed Dec 06, 2017

Resource Theory of Superposition


Author(s): T. Theurer, N. Killoran, D. Egloff, and M. B. Plenio

Resource theories of coherence are generalized to quantify the superposition of a finite number of linearly independent states.

[Phys. Rev. Lett. 119, 230401] Published Tue Dec 05, 2017

Spin-Mechanical Scheme with Color Centers in Hexagonal Boron Nitride Membranes


Author(s): Mehdi Abdi, Myung-Joong Hwang, Mortaza Aghtar, and Martin B. Plenio

Recently observed quantum emitters in hexagonal boron nitride (hBN) membranes have a potential for achieving high accessibility and controllability thanks to the lower spatial dimension. Moreover, these objects naturally have a high sensitivity to vibrations of the hosting membrane due to its low ma...

[Phys. Rev. Lett. 119, 233602] Published Tue Dec 05, 2017

Anisotropic Superattenuation of Capillary Waves on Driven Glass Interfaces


Author(s): Bruno Bresson, Coralie Brun, Xavier Buet, Yong Chen, Matteo Ciccotti, Jérôme Gâteau, Greg Jasion, Marco N. Petrovich, Francesco Poletti, David J. Richardson, Seyed Reza Sandoghchi, Gilles Tessier, Botond Tyukodi, and Damien Vandembroucq

Metrological atomic force microscopy measurements are performed on the silica glass interfaces of photonic band-gap fibers and hollow capillaries. The freezing of attenuated out-of-equilibrium capillary waves during the drawing process is shown to result in a reduced surface roughness. The roughness...

[Phys. Rev. Lett. 119, 235501] Published Tue Dec 05, 2017

Doublon-Holon Origin of the Subpeaks at the Hubbard Band Edges


Author(s): Seung-Sup B. Lee, Jan von Delft, and Andreas Weichselbaum

Dynamical mean-field theory (DMFT) studies frequently observe a fine structure in the local spectral function of the SU(2) Fermi-Hubbard model at half filling: In the metallic phase close to the Mott transition, subpeaks emerge at the inner edges of the Hubbard bands. Here we demonstrate that these ...

[Phys. Rev. Lett. 119, 236402] Published Tue Dec 05, 2017

Switching Molecular Conformation with the Torque on a Single Magnetic Moment


Author(s): Aram Kostanyan, Rasmus Westerström, Yang Zhang, David Kunhardt, Roland Stania, Bernd Büchner, Alexey A. Popov, and Thomas Greber

For the endohedral fullerene molecule ${\mathrm{HoLu}}_{2}\mathrm{N}@{\mathrm{C}}_{80}$, it is shown that the endohedral ${\mathrm{HoLu}}_{2}\mathrm{N}$ unit may be oriented in a magnetic field. The Ho magnetic moment is fixed in the strong ligand field and aligns along the holmium-nitrogen axis. Th...

[Phys. Rev. Lett. 119, 237202] Published Tue Dec 05, 2017

Chemical Continuous Time Random Walks


Author(s): Tomás Aquino and Marco Dentz

Kinetic Monte Carlo methods such as the Gillespie algorithm model chemical reactions as random walks in particle number space. The interreaction times are exponentially distributed under the assumption that the system is well mixed. We introduce an arbitrary interreaction time distribution, which ma...

[Phys. Rev. Lett. 119, 230601] Published Mon Dec 04, 2017

MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle


Author(s): Pierre Touboul et al.

The MICROSCOPE satellite mission has tested the equivalence principle with unprecedented precision, showing no deviations from the predictions of general relativity.

[Phys. Rev. Lett. 119, 231101] Published Mon Dec 04, 2017

Fate of the Hoop Conjecture in Quantum Gravity


Author(s): Fabio Anzà and Goffredo Chirco

We consider a closed region $R$ of 3D quantum space described via SU(2) spin networks. Using the concentration of measure phenomenon we prove that, whenever the ratio between the boundary $∂R$ and the bulk edges of the graph overcomes a finite threshold, the state of the boundary is always thermal, ...

[Phys. Rev. Lett. 119, 231301] Published Mon Dec 04, 2017

First Observation of the Rare Purely Baryonic Decay ${B}^{0}→p\overline{p}$


Author(s): R. Aaij et al. (LHCb Collaboration)

The first observation of the decay of a ${B}^{0}$ meson to a purely baryonic final state, ${B}^{0}→p\overline{p}$, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of...

[Phys. Rev. Lett. 119, 232001] Published Mon Dec 04, 2017

Efimov States of Strongly Interacting Photons


Author(s): M. J. Gullans, S. Diehl, S. T. Rittenhouse, B. P. Ruzic, J. P. D’Incao, P. Julienne, A. V. Gorshkov, and J. M. Taylor

We demonstrate the emergence of universal Efimov physics for interacting photons in cold gases of Rydberg atoms. We consider the behavior of three photons injected into the gas in their propagating frame, where a paraxial approximation allows us to consider them as massive particles. In contrast to ...

[Phys. Rev. Lett. 119, 233601] Published Mon Dec 04, 2017

Enhancing Coherent Light-Matter Interactions through Microcavity-Engineered Plasmonic Resonances


Author(s): Pai Peng ((彭湃)), Yong-Chun Liu, Da Xu, Qi-Tao Cao, Guowei Lu, Qihuang Gong, and Yun-Feng Xiao

Quantum manipulation is challenging in localized-surface plasmon resonances (LSPRs) due to strong dissipations. To enhance quantum coherence, here we propose to engineer the electromagnetic environment of LSPRs by placing metallic nanoparticles (MNPs) in optical microcavities. An analytical quantum ...

[Phys. Rev. Lett. 119, 233901] Published Mon Dec 04, 2017

Melting Curve and Liquid Structure of Nitrogen Probed by X-ray Diffraction to 120 GPa


Author(s): Gunnar Weck, Frédéric Datchi, Gaston Garbarino, Sandra Ninet, Jean-Antoine Queyroux, Thomas Plisson, Mohamed Mezouar, and Paul Loubeyre

Synchrotron x-ray diffraction measurements of nitrogen are performed up to 120 GPa to determine the melting curve and the structural changes of the solid and liquid phases along it. The melting temperature exhibits a monotonic increase up to the triple point where the epsilon molecular solid, the cu...

[Phys. Rev. Lett. 119, 235701] Published Mon Dec 04, 2017

Observation of Caroli–de Gennes–Matricon Vortex States in ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7−δ}$


Author(s): Christophe Berthod, Ivan Maggio-Aprile, Jens Bruér, Andreas Erb, and Christoph Renner

Experiments on a copper-based high-temperature superconductor uncover the existence of vortex states—a hallmark of conventional superconductivity.

[Phys. Rev. Lett. 119, 237001] Published Mon Dec 04, 2017

Link between the Superconducting Dome and Spin-Orbit Interaction in the (111) ${\mathrm{LaAlO}}_{3}/\mathrm{SrTi}{\mathrm{O}}_{3}$ Interface


Author(s): P. K. Rout, E. Maniv, and Y. Dagan

We measure the gate voltage (${V}_{g}$) dependence of the superconducting properties and the spin-orbit interaction in the (111)-oriented ${\mathrm{LaAlO}}_{3}/\mathrm{SrTi}{\mathrm{O}}_{3}$ interface. Superconductivity is observed in a dome-shaped region in the carrier density-temperature phase dia...

[Phys. Rev. Lett. 119, 237002] Published Mon Dec 04, 2017

Néel-Type Skyrmion Lattice in the Tetragonal Polar Magnet ${\mathrm{VOSe}}_{2}{\mathrm{O}}_{5}$


Author(s): Takashi Kurumaji, Taro Nakajima, Victor Ukleev, Artem Feoktystov, Taka-hisa Arima, Kazuhisa Kakurai, and Yoshinori Tokura

The formation of the triangular Skyrmion lattice is found in a tetragonal polar magnet ${\mathrm{VOSe}}_{2}{\mathrm{O}}_{5}$. By magnetization and small-angle neutron scattering measurements on the single crystals, we identify a cycloidal spin state at zero field and a Néel-type Skyrmion-lattice pha...

[Phys. Rev. Lett. 119, 237201] Published Mon Dec 04, 2017

Experimental Detection of Information Deficit in a Photonic Contextuality Scenario


Author(s): Xiang Zhan, Paweł Kurzyński, Dagomir Kaszlikowski, Kunkun Wang, Zhihao Bian, Yongsheng Zhang, and Peng Xue

Contextuality is an essential characteristic of quantum theory, and supplies the power for many quantum information processes. Previous tests of contextuality focus mainly on the probability distribution of measurement results. However, a test of contextuality can be formulated in terms of entropic ...

[Phys. Rev. Lett. 119, 220403] Published Fri Dec 01, 2017

Arrow of Time for Continuous Quantum Measurement


Author(s): Justin Dressel, Areeya Chantasri, Andrew N. Jordan, and Alexander N. Korotkov

We investigate the statistical arrow of time for a quantum system being monitored by a sequence of measurements. For a continuous qubit measurement example, we demonstrate that time-reversed evolution is always physically possible, provided that the measurement record is also negated. Despite this r...

[Phys. Rev. Lett. 119, 220507] Published Fri Dec 01, 2017

Factorization and Criticality in Finite $XXZ$ Systems of Arbitrary Spin


Author(s): M. Cerezo, R. Rossignoli, N. Canosa, and E. Ríos

We analyze ground state (GS) factorization in general arrays of spins ${s}_{i}$ with $XXZ$ couplings immersed in nonuniform fields. It is shown that an exceptionally degenerate set of completely separable symmetry-breaking GSs can arise for a wide range of field configurations, at a quantum critical...

[Phys. Rev. Lett. 119, 220605] Published Fri Dec 01, 2017

Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$


Author(s): A. M. Sirunyan et al. (CMS Collaboration)

A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ collected by the CMS experiment at the LHC in 2016 and corresponds to an...

[Phys. Rev. Lett. 119, 221802] Published Fri Dec 01, 2017

Exit-Channel Suppression in Statistical Reaction Theory


Author(s): G. F. Bertsch and T. Kawano

Statistical reaction theories such as the Hauser-Feshbach theory assume that branching ratios follow Bohr’s compound nucleus hypothesis by factorizing into independent probabilities for different channels. Corrections to the factorization hypothesis are known in both nuclear theory and quantum trans...

[Phys. Rev. Lett. 119, 222504] Published Fri Dec 01, 2017

Ab initio Calculations of the Isotopic Dependence of Nuclear Clustering


Author(s): Serdar Elhatisari, Evgeny Epelbaum, Hermann Krebs, Timo A. Lähde, Dean Lee, Ning Li, Bing-nan Lu, Ulf-G. Meißner, and Gautam Rupak

Nuclear clustering describes the appearance of structures resembling smaller nuclei such as alpha particles ($^{4}\text{He}$ nuclei) within the interior of a larger nucleus. In this Letter, we present lattice Monte Carlo calculations based on chiral effective field theory for the ground states of he...

[Phys. Rev. Lett. 119, 222505] Published Fri Dec 01, 2017

Steady-State Magneto-Optical Trap with 100-Fold Improved Phase-Space Density


Author(s): Shayne Bennetts, Chun-Chia Chen (陳俊嘉), Benjamin Pasquiou, and Florian Schreck

We demonstrate a continuously loaded $^{88}\mathrm{Sr}$ magneto-optical trap (MOT) with a steady-state phase-space density of $1.3(2)×{10}^{−3}$. This is 2 orders of magnitude higher than reported in previous steady-state MOTs. Our approach is to flow atoms through a series of spatially separated la...

[Phys. Rev. Lett. 119, 223202] Published Fri Dec 01, 2017

Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of $α\text{−}{\mathrm{RuCl}}_{3}$


Author(s): Jiacheng Zheng, Kejing Ran, Tianrun Li, Jinghui Wang, Pengshuai Wang, Bin Liu, Zheng-Xin Liu, B. Normand, Jinsheng Wen, and Weiqiang Yu

$α\text{−}{\mathrm{RuCl}}_{3}$ is a leading candidate material for the observation of physics related to the Kitaev quantum spin liquid (QSL). By combined susceptibility, specific-heat, and nuclear-magnetic-resonance measurements, we demonstrate that $α\text{−}{\mathrm{RuCl}}_{3}$ undergoes a quantu...

[Phys. Rev. Lett. 119, 227208] Published Fri Dec 01, 2017

Asymmetric Splitting of an Antiferromagnetic Resonance via Quartic Exchange Interactions in Multiferroic Hexagonal ${\mathrm{HoMnO}}_{3}$


Author(s): N. J. Laurita, Yi Luo, Rongwei Hu, Meixia Wu, S. W. Cheong, O. Tchernyshyov, and N. P. Armitage

The symmetric splitting of two spin-wave branches in an antiferromagnetic resonance (AFR) experiment has been an essential measurement of antiferromagnets for over half a century. In this work, circularly polarized time-domain THz spectroscopy experiments performed on the low symmetry multiferroic h...

[Phys. Rev. Lett. 119, 227601] Published Fri Dec 01, 2017

Multivalent-Ion-Activated Protein Adsorption Reflecting Bulk Reentrant Behavior


Author(s): Madeleine R. Fries, Daniel Stopper, Michal K. Braun, Alexander Hinderhofer, Fajun Zhang, Robert M. J. Jacobs, Maximilian W. A. Skoda, Hendrik Hansen-Goos, Roland Roth, and Frank Schreiber

Protein adsorption at the solid-liquid interface is an important phenomenon that often can be observed as a first step in biological processes. Despite its inherent importance, still relatively little is known about the underlying microscopic mechanisms. Here, using multivalent ions, we demonstrate ...

[Phys. Rev. Lett. 119, 228001] Published Fri Dec 01, 2017

Experimental Study of Ordering of Hard Cubes by Shearing


Author(s): K. Asencio, M. Acevedo, I. Zuriguel, and D. Maza

A jumble of thousands of cubic dice, agitated by an oscillating rotation, can rapidly become completely ordered, a result that is hard to produce with more conventional shaking.

[Phys. Rev. Lett. 119, 228002] Published Fri Dec 01, 2017

Private States, Quantum Data Hiding, and the Swapping of Perfect Secrecy


Author(s): Matthias Christandl and Roberto Ferrara

An important contribution to the understanding of quantum key distribution has been the discovery of entangled states from which secret bits, but no maximally entangled states, can be extracted [Horodecki et al., Phys. Rev. Lett. 94, 200501 (2005)]. The construction of those states was based on an i...

[Phys. Rev. Lett. 119, 220506] Published Thu Nov 30, 2017

Solvable Hydrodynamics of Quantum Integrable Systems


Author(s): Vir B. Bulchandani, Romain Vasseur, Christoph Karrasch, and Joel E. Moore

The conventional theory of hydrodynamics describes the evolution in time of chaotic many-particle systems from local to global equilibrium. In a quantum integrable system, local equilibrium is characterized by a local generalized Gibbs ensemble or equivalently a local distribution of pseudomomenta. ...

[Phys. Rev. Lett. 119, 220604] Published Thu Nov 30, 2017

Maximum Redshift of Gravitational Wave Merger Events


Author(s): Savvas M. Koushiappas and Abraham Loeb

Observations of black hole mergers in the very distant Universe could indicate whether all black holes form from stars.

[Phys. Rev. Lett. 119, 221104] Published Thu Nov 30, 2017

Symmetry Protected Dynamical Symmetry in the Generalized Hubbard Models


Author(s): Jinlong Yu, Ning Sun, and Hui Zhai

In this Letter we present a theorem on the dynamics of the generalized Hubbard models. This theorem shows that the symmetry of the single-particle Hamiltonian can protect a kind of dynamical symmetry driven by the interactions. Here the dynamical symmetry refers to the phenomenon that time evolution...

[Phys. Rev. Lett. 119, 225302] Published Thu Nov 30, 2017

Transport Signatures of the Hall Viscosity


Author(s): Luca V. Delacrétaz and Andrey Gromov

A method is proposed for measuring the classical Hall viscosity of a two-dimensional electron gas under a magnetic field, via signatures of hydrodynamic transport.

[Phys. Rev. Lett. 119, 226602] Published Thu Nov 30, 2017

Group Theoretical Route to Deterministic Weyl Points in Chiral Photonic Lattices


Author(s): Matthias Saba, Joachim M. Hamm, Jeremy J. Baumberg, and Ortwin Hess

Topological phases derived from point degeneracies in photonic band structures show intriguing and unique behavior. Previously identified band degeneracies are based on accidental degeneracies and subject to engineering on a case-by-case basis. Here we show that deterministic pseudo Weyl points with...

[Phys. Rev. Lett. 119, 227401] Published Thu Nov 30, 2017

Negative Spin Exchange in a Multielectron Quantum Dot


Author(s): Frederico Martins, Filip K. Malinowski, Peter D. Nissen, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra, Charles M. Marcus, and Ferdinand Kuemmeth

Experiments show that a semiconducting quantum dot containing nearly 100 electrons can operate as an effective spin 1/2 qubit.

[Phys. Rev. Lett. 119, 227701] Published Thu Nov 30, 2017

Communication Games Reveal Preparation Contextuality


Author(s): Alley Hameedi, Armin Tavakoli, Breno Marques, and Mohamed Bourennane

A communication game consists of distributed parties attempting to jointly complete a task with restricted communication. Such games are useful tools for studying limitations of physical theories. A theory exhibits preparation contextuality whenever its predictions cannot be explained by a preparati...

[Phys. Rev. Lett. 119, 220402] Published Wed Nov 29, 2017

Generic Local Hamiltonians are Gapless


Author(s): Ramis Movassagh

We prove that generic quantum local Hamiltonians are gapless. In fact, we prove that there is a continuous density of states above the ground state. The Hamiltonian can be on a lattice in any spatial dimension or on a graph with a bounded maximum vertex degree. The type of interactions allowed for i...

[Phys. Rev. Lett. 119, 220504] Published Wed Nov 29, 2017

Fast Dynamical Decoupling of the Mølmer-Sørensen Entangling Gate


Author(s): Tom Manovitz, Amit Rotem, Ravid Shaniv, Itsik Cohen, Yotam Shapira, Nitzan Akerman, Alex Retzker, and Roee Ozeri

Engineering entanglement between quantum systems often involves coupling through a bosonic mediator, which should be disentangled from the systems at the operation’s end. The quality of such an operation is generally limited by environmental and control noise. One of the prime techniques for suppres...

[Phys. Rev. Lett. 119, 220505] Published Wed Nov 29, 2017

Entanglement Entropy of Eigenstates of Quantum Chaotic Hamiltonians


Author(s): Lev Vidmar and Marcos Rigol

In quantum statistical mechanics, it is of fundamental interest to understand how close the bipartite entanglement entropy of eigenstates of quantum chaotic Hamiltonians is to maximal. For random pure states in the Hilbert space, the average entanglement entropy is known to be nearly maximal, with a...

[Phys. Rev. Lett. 119, 220603] Published Wed Nov 29, 2017

Beyond the Boost: Measuring the Intrinsic Dipole of the Cosmic Microwave Background Using the Spectral Distortions of the Monopole and Quadrupole


Author(s): Siavash Yasini and Elena Pierpaoli

We present a general framework for the accurate spectral modeling of the low multipoles of the cosmic microwave background (CMB) as observed in a boosted frame. In particular, we demonstrate how spectral measurements of the low multipoles can be used to separate the motion-induced dipole of the CMB ...

[Phys. Rev. Lett. 119, 221102] Published Wed Nov 29, 2017

Recognizing Axionic Dark Matter by Compton and de Broglie Scale Modulation of Pulsar Timing


Author(s): Ivan De Martino, Tom Broadhurst, S.-H. Henry Tye, Tzihong Chiueh, Hsi-Yu Schive, and Ruth Lazkoz

Light axionic dark matter, motivated by string theory, is increasingly favored for the “no weakly interacting massive particle era”. Galaxy formation is suppressed below a Jeans scale of $≃{10}^{8}\text{ }\text{ }{M}_{⊙}$ by setting the axion mass to ${m}_{B}∼{10}^{−22}\text{ }\text{ }\mathrm{eV}$, ...

[Phys. Rev. Lett. 119, 221103] Published Wed Nov 29, 2017

Order Parameters and Color-Flavor Center Symmetry in QCD


Author(s): Aleksey Cherman, Srimoyee Sen, Mithat Ünsal, Michael L. Wagman, and Laurence G. Yaffe

Common lore suggests that $N$-color QCD with massive quarks has no useful order parameters that can be nontrivial at zero baryon density. However, such order parameters do exist when there are ${n}_{f}$ quark flavors with a common mass and $d≡gcd({n}_{f},N)>1$. These theories have a ${\mathbb{Z}}...

[Phys. Rev. Lett. 119, 222001] Published Wed Nov 29, 2017

Neutron Skin Thickness of $^{48}\mathrm{Ca}$ from a Nonlocal Dispersive Optical-Model Analysis


Author(s): M. H. Mahzoon, M. C. Atkinson, R. J. Charity, and W. H. Dickhoff

A nonlocal dispersive optical-model analysis has been carried out for neutrons and protons in $^{48}\mathrm{Ca}$. Elastic-scattering angular distributions, total and reaction cross sections, single-particle energies, the neutron and proton numbers, and the charge distribution have been fitted to ext...

[Phys. Rev. Lett. 119, 222503] Published Wed Nov 29, 2017

Proton Spectra from $^{3}\mathrm{He}+\mathrm{T}$ and $^{3}\mathrm{He}+^{3}\mathrm{He}$ Fusion at Low Center-of-Mass Energy, with Potential Implications for Solar Fusion Cross Sections


Author(s): A. B. Zylstra, J. A. Frenje, M. Gatu Johnson, G. M. Hale, C. R. Brune, A. Bacher, D. T. Casey, C. K. Li, D. McNabb, M. Paris, R. D. Petrasso, T. C. Sangster, D. B. Sayre, and F. H. Séguin

Few-body nuclear physics often relies upon phenomenological models, with new efforts at the ab initio theory reported recently; both need high-quality benchmark data, particularly at low center-of-mass energies. We use high-energy-density plasmas to measure the proton spectra from $^{3}\mathrm{He}+\...

[Phys. Rev. Lett. 119, 222701] Published Wed Nov 29, 2017

Ground-State Properties of Unitary Bosons: From Clusters to Matter


Author(s): J. Carlson, S. Gandolfi, U. van Kolck, and S. A. Vitiello

The properties of cold Bose gases at unitarity have been extensively investigated in the last few years both theoretically and experimentally. In this Letter we use a family of interactions tuned to two-body unitarity and very weak three-body binding to demonstrate the universal properties of both c...

[Phys. Rev. Lett. 119, 223002] Published Wed Nov 29, 2017

Converging High-Level Coupled-Cluster Energetics by Monte Carlo Sampling and Moment Expansions


Author(s): J. Emiliano Deustua, Jun Shen, and Piotr Piecuch

We propose a new approach to the determination of accurate electronic energies that are equivalent to the results of high-level coupled-cluster (CC) calculations. The approach is based on merging the $\mathrm{CC}(P;Q)$ formalism, which corrects energies obtained with an arbitrary truncation in the c...

[Phys. Rev. Lett. 119, 223003] Published Wed Nov 29, 2017

Probing Low-Mass Vector Bosons with Parity Nonconservation and Nuclear Anapole Moment Measurements in Atoms and Molecules


Author(s): V. A. Dzuba, V. V. Flambaum, and Y. V. Stadnik

In the presence of $P$-violating interactions, the exchange of vector bosons between electrons and nucleons induces parity-nonconserving (PNC) effects in atoms and molecules, while the exchange of vector bosons between nucleons induces anapole moments of nuclei. We perform calculations of such vecto...

[Phys. Rev. Lett. 119, 223201] Published Wed Nov 29, 2017

Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout


Author(s): D. D. Sukachev, A. Sipahigil, C. T. Nguyen, M. K. Bhaskar, R. E. Evans, F. Jelezko, and M. D. Lukin

The negatively charged silicon-vacancy (${\mathrm{SiV}}^{−}$) color center in diamond has recently emerged as a promising system for quantum photonics. Its symmetry-protected optical transitions enable the creation of indistinguishable emitter arrays and deterministic coupling to nanophotonic device...

[Phys. Rev. Lett. 119, 223602] Published Wed Nov 29, 2017

Multiphoton Effects Enhanced due to Ultrafast Photon-Number Fluctuations


Author(s): Kirill Yu. Spasibko, Denis A. Kopylov, Victor L. Krutyanskiy, Tatiana V. Murzina, Gerd Leuchs, and Maria V. Chekhova

The rate of an $n$-photon effect generally scales as the $n$th order autocorrelation function of the incident light, which is high for light with strong photon-number fluctuations. Therefore, “noisy” light sources are much more efficient for multiphoton effects than coherent sources with the same me...

[Phys. Rev. Lett. 119, 223603] Published Wed Nov 29, 2017