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Published: 2017-12-15T01:02:46+00:00
2017-12-14T10:00:00+00:00
Author(s): Mohammad Atif, Praveen Kumar Kolluru, Chakradhar Thantanapally, and Santosh AnsumaliThe 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...
2017-12-14T10:00:00+00:00
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.
(image)2017-12-14T10:00:00+00:00
Author(s): S. Pipolo, M. Salanne, G. Ferlat, S. Klotz, A. M. Saitta, and F. PietrucciDespite 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...
2017-12-14T10:00:00+00:00
Author(s): Mirco Milletarì, Manuel Offidani, Aires Ferreira, and Roberto RaimondiWe 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...
2017-12-14T10:00:00+00:00
Author(s): Igor Segota and Carl FranckEukaryotic 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...
2017-12-14T10:00:00+00:00
Author(s): Yang Yang and Adilson E. MotterIn 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...
2017-12-13T10:00:00+00:00
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 MilburnTwo proposals describe how to test whether gravity is inherently quantum by measuring the entanglement between two masses.
(image)2017-12-13T10:00:00+00:00
Author(s): C. Marletto and V. VedralTwo proposals describe how to test whether gravity is inherently quantum by measuring the entanglement between two masses.
(image)2017-12-13T10:00:00+00:00
Author(s): Iris Schwenk, Sebastian Zanker, Jan-Michael Reiner, Juha Leppäkangas, and Michael MarthalerWe 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...
2017-12-13T10:00:00+00:00
Author(s): Matteo Polettini and Massimiliano EspositoThermodynamics 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...
2017-12-13T10:00:00+00:00
Author(s): Bartosz Fornal and Benjamín GrinsteinWe 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...
2017-12-13T10:00:00+00:00
Author(s): Tim Gould and Stefano PittalisEnsemble 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...
2017-12-13T10:00:00+00:00
Author(s): C. Brée, M. Hofmann, A. Demircan, U. Morgner, O. Kosareva, A. Savel’ev, A. Husakou, M. Ivanov, and I. BabushkinThe 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...
2017-12-13T10:00:00+00:00
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 ChenIn 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...
2017-12-13T10:00:00+00:00
Author(s): Mikhail V. Rybin, Kirill L. Koshelev, Zarina F. Sadrieva, Kirill B. Samusev, Andrey A. Bogdanov, Mikhail F. Limonov, and Yuri S. KivsharRecent 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...
2017-12-13T10:00:00+00:00
Author(s): V. Dorier, M. Gevorgyan, A. Ishkhanyan, C. Leroy, H. R. Jauslin, and S. GuérinWe 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...
2017-12-13T10:00:00+00:00
Author(s): Zachary G. Nicolaou, Hermann Riecke, and Adilson E. MotterThe 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...
2017-12-13T10:00:00+00:00
Author(s): Santosh Kumar, Barbara Dietz, Thomas Guhr, and Achim RichterThe 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.
(image)2017-12-13T10:00:00+00:00
Author(s): R. Lehe, C. B. Schroeder, J.-L. Vay, E. Esarey, and W. P. LeemansThe 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...
2017-12-13T10:00:00+00:00
Author(s): Gal Lemut, Marcin Mierzejewski, and Janez BončaThe 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...
2017-12-13T10:00:00+00:00
Author(s): A. Doron, I. Tamir, T. Levinson, M. Ovadia, B. Sacépé, and D. ShaharThin 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...
2017-12-13T10:00:00+00:00
Author(s): Kangkang Li, Chenyuan Li, Jiangping Hu, Yuan Li, and Chen FangWe 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...
2017-12-13T10:00:00+00:00
Author(s): F. Hu, Suprem R. Das, Y. Luan, T.-F. Chung, Y. P. Chen, and Z. FeiWe 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...
2017-12-13T10:00:00+00:00
Author(s): G. A. Patterson, P. I. Fierens, F. Sangiuliano Jimka, P. G. König, A. Garcimartín, I. Zuriguel, L. A. Pugnaloni, and D. R. ParisiWe 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...
2017-12-12T10:00:00+00:00
Author(s): Oliver Gould and Arttu RajantieA new analysis places some of the tightest bounds yet on the mass that magnetic monopoles should have if they exist.
(image)2017-12-12T10:00:00+00:00
Author(s): Luchan Zhang, Jian Han, Yang Xiang, and David J. SrolovitzGrain 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...
2017-12-11T10:00:00+00:00
Author(s): Anatoly Kulikov, Markus Jerger, Anton Potočnik, Andreas Wallraff, and Arkady FedorovRandom 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...
2017-12-11T10:00:00+00:00
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. WilliamsWe 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}....
2017-12-11T10:00:00+00:00
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 KitzlerWe 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...
2017-12-11T10:00:00+00:00
Author(s): Z. Yoshida and P. J. MorrisonWhile 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...
2017-12-11T10:00:00+00:00
Author(s): Gang Sun, Shibu Saw, Ian Douglass, and Peter HarrowellThe 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...
2017-12-11T10:00:00+00:00
Author(s): Josias Langbehn, Yang Peng, Luka Trifunovic, Felix von Oppen, and Piet W. BrouwerTheorists have discovered topological insulators that are insulating in their interior and on their surfaces but have conducting channels at corners or along edges.
(image)2017-12-11T10:00:00+00:00
Author(s): Zhida Song, Zhong Fang, and Chen FangTheorists have discovered topological insulators that are insulating in their interior and on their surfaces but have conducting channels at corners or along edges.
(image)2017-12-11T10:00:00+00:00
Author(s): Thomas Bilitewski, Mike E. Zhitomirsky, and Roderich MoessnerWe 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...
2017-12-11T10:00:00+00:00
Author(s): Hirokazu Tahara, Masanori Sakamoto, Toshiharu Teranishi, and Yoshihiko KanemitsuThe 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 ...
2017-12-11T10:00:00+00:00
Author(s): Carlos R. López-Barrón and Huaxing ZhouAromatic $π\text{−}π$ 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...
2017-12-11T10:00:00+00:00
Author(s): S. Peter Bierwirth, Roland Böhmer, and Catalin GainaruFour 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...
2017-12-08T10:00:00+00:00
Author(s): J. D. Wong-Campos, S. A. Moses, K. G. Johnson, and C. MonroeWe 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 ...
2017-12-08T10:00:00+00:00
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. SaastamoinenWe 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...
2017-12-08T10:00:00+00:00
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 ZhangIn 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...
2017-12-08T10:00:00+00:00
Author(s): Alexandre Cohen, Nathalie Fraysse, and Christophe RaufasteA liquid microchannel—the line where three soap films meet—vibrates like a string whose diameter shrinks as the shaking force increases.
(image)2017-12-07T10:00:00+00:00
Author(s): B. J. DeSalvo, Krutik Patel, Jacob Johansen, and Cheng ChinA Bose-Einstein condensate can act as a stable trap for a gas of fermions.
(image)2017-12-06T10:00:00+00:00
Author(s): Matteo Fadel and Jordi TuraWe 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...
2017-12-06T10:00:00+00:00
Author(s): Karla Loida, Jean-Sébastien Bernier, Roberta Citro, Edmond Orignac, and Corinna KollathAn 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 ...
2017-12-06T10:00:00+00:00
Author(s): Dominique Delande, Luis Morales-Molina, and Krzysztof SachaSystems 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 ...
2017-12-06T10:00:00+00:00
Author(s): Daniel M. Siegel and Brian D. MetzgerNew 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.
(image)2017-12-06T10:00:00+00:00
Author(s): Avishek Chowdhury, Sylvain Barbay, Marcel G. Clerc, Isabelle Robert-Philip, and Rémy BraiveStochastic 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...
2017-12-06T10:00:00+00:00
Author(s): S. Kreuzahler, Y. Ponty, N. Plihon, H. Homann, and R. GrauerWe 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...
2017-12-06T10:00:00+00:00
Author(s): E. Yakaboylu, A. Deuchert, and M. LemeshkoRecently, 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...
2017-12-06T10:00:00+00:00
Author(s): Stephan Humeniuk and Hans Peter BüchlerWe 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...
2017-12-06T10:00:00+00:00
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. MandrusThe 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...
2017-12-06T10:00:00+00:00
Author(s): Mathias Weiler, Aisha Aqeel, Maxim Mostovoy, Andrey Leonov, Stephan Geprägs, Rudolf Gross, Hans Huebl, Thomas T. M. Palstra, and Sebastian T. B. GoennenweinWe 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...
2017-12-06T10:00:00+00:00
Author(s): Erkan Senses, Suresh Narayanan, Yimin Mao, and Antonio FaraoneUsing 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...
2017-12-05T10:00:00+00:00
Author(s): T. Theurer, N. Killoran, D. Egloff, and M. B. PlenioResource theories of coherence are generalized to quantify the superposition of a finite number of linearly independent states.
(image)2017-12-05T10:00:00+00:00
Author(s): Mehdi Abdi, Myung-Joong Hwang, Mortaza Aghtar, and Martin B. PlenioRecently 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...
2017-12-05T10:00:00+00:00
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 VandembroucqMetrological 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...
2017-12-05T10:00:00+00:00
Author(s): Seung-Sup B. Lee, Jan von Delft, and Andreas WeichselbaumDynamical 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 ...
2017-12-05T10:00:00+00:00
Author(s): Aram Kostanyan, Rasmus Westerström, Yang Zhang, David Kunhardt, Roland Stania, Bernd Büchner, Alexey A. Popov, and Thomas GreberFor 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...
2017-12-04T10:00:00+00:00
Author(s): Tomás Aquino and Marco DentzKinetic 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...
2017-12-04T10:00:00+00:00
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.
(image)2017-12-04T10:00:00+00:00
Author(s): Fabio Anzà and Goffredo ChircoWe 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, ...
2017-12-04T10:00:00+00:00
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...
2017-12-04T10:00:00+00:00
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. TaylorWe 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 ...
2017-12-04T10:00:00+00:00
Author(s): Pai Peng ((彭湃)), Yong-Chun Liu, Da Xu, Qi-Tao Cao, Guowei Lu, Qihuang Gong, and Yun-Feng XiaoQuantum 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 ...
2017-12-04T10:00:00+00:00
Author(s): Gunnar Weck, Frédéric Datchi, Gaston Garbarino, Sandra Ninet, Jean-Antoine Queyroux, Thomas Plisson, Mohamed Mezouar, and Paul LoubeyreSynchrotron 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...
2017-12-04T10:00:00+00:00
Author(s): Christophe Berthod, Ivan Maggio-Aprile, Jens Bruér, Andreas Erb, and Christoph RennerExperiments on a copper-based high-temperature superconductor uncover the existence of vortex states—a hallmark of conventional superconductivity.
(image)2017-12-04T10:00:00+00:00
Author(s): P. K. Rout, E. Maniv, and Y. DaganWe 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...
2017-12-04T10:00:00+00:00
Author(s): Takashi Kurumaji, Taro Nakajima, Victor Ukleev, Artem Feoktystov, Taka-hisa Arima, Kazuhisa Kakurai, and Yoshinori TokuraThe 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...
2017-12-01T10:00:00+00:00
Author(s): Xiang Zhan, Paweł Kurzyński, Dagomir Kaszlikowski, Kunkun Wang, Zhihao Bian, Yongsheng Zhang, and Peng XueContextuality 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 ...
2017-12-01T10:00:00+00:00
Author(s): Justin Dressel, Areeya Chantasri, Andrew N. Jordan, and Alexander N. KorotkovWe 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...
2017-12-01T10:00:00+00:00
Author(s): M. Cerezo, R. Rossignoli, N. Canosa, and E. RíosWe 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...
2017-12-01T10:00:00+00:00
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...
2017-12-01T10:00:00+00:00
Author(s): G. F. Bertsch and T. KawanoStatistical 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...
2017-12-01T10:00:00+00:00
Author(s): Serdar Elhatisari, Evgeny Epelbaum, Hermann Krebs, Timo A. Lähde, Dean Lee, Ning Li, Bing-nan Lu, Ulf-G. Meißner, and Gautam RupakNuclear 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...
2017-12-01T10:00:00+00:00
Author(s): Shayne Bennetts, Chun-Chia Chen (陳俊嘉), Benjamin Pasquiou, and Florian SchreckWe 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...
2017-12-01T10:00:00+00:00
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...
2017-12-01T10:00:00+00:00
Author(s): N. J. Laurita, Yi Luo, Rongwei Hu, Meixia Wu, S. W. Cheong, O. Tchernyshyov, and N. P. ArmitageThe 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...
2017-12-01T10:00:00+00:00
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 SchreiberProtein 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 ...
2017-12-01T10:00:00+00:00
Author(s): K. Asencio, M. Acevedo, I. Zuriguel, and D. MazaA 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.
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Author(s): Matthias Christandl and Roberto FerraraAn 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...
2017-11-30T10:00:00+00:00
Author(s): Vir B. Bulchandani, Romain Vasseur, Christoph Karrasch, and Joel E. MooreThe 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. ...
2017-11-30T10:00:00+00:00
Author(s): Savvas M. Koushiappas and Abraham LoebObservations of black hole mergers in the very distant Universe could indicate whether all black holes form from stars.
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Author(s): Jinlong Yu, Ning Sun, and Hui ZhaiIn 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...
2017-11-30T10:00:00+00:00
Author(s): Luca V. Delacrétaz and Andrey GromovA method is proposed for measuring the classical Hall viscosity of a two-dimensional electron gas under a magnetic field, via signatures of hydrodynamic transport.
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Author(s): Matthias Saba, Joachim M. Hamm, Jeremy J. Baumberg, and Ortwin HessTopological 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...
2017-11-30T10:00:00+00:00
Author(s): Frederico Martins, Filip K. Malinowski, Peter D. Nissen, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra, Charles M. Marcus, and Ferdinand KuemmethExperiments show that a semiconducting quantum dot containing nearly 100 electrons can operate as an effective spin 1/2 qubit.
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Author(s): Alley Hameedi, Armin Tavakoli, Breno Marques, and Mohamed BourennaneA 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...
2017-11-29T10:00:00+00:00
Author(s): Ramis MovassaghWe 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...
2017-11-29T10:00:00+00:00
Author(s): Tom Manovitz, Amit Rotem, Ravid Shaniv, Itsik Cohen, Yotam Shapira, Nitzan Akerman, Alex Retzker, and Roee OzeriEngineering 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...
2017-11-29T10:00:00+00:00
Author(s): Lev Vidmar and Marcos RigolIn 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...
2017-11-29T10:00:00+00:00
Author(s): Siavash Yasini and Elena PierpaoliWe 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 ...
2017-11-29T10:00:00+00:00
Author(s): Ivan De Martino, Tom Broadhurst, S.-H. Henry Tye, Tzihong Chiueh, Hsi-Yu Schive, and Ruth LazkozLight 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 ${m}_{B}∼{10}^{−22}\text{ }\text{ }\mathrm{eV}$, ...
2017-11-29T10:00:00+00:00
Author(s): Aleksey Cherman, Srimoyee Sen, Mithat Ünsal, Michael L. Wagman, and Laurence G. YaffeCommon 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}}...
2017-11-29T10:00:00+00:00
Author(s): M. H. Mahzoon, M. C. Atkinson, R. J. Charity, and W. H. DickhoffA 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...
2017-11-29T10:00:00+00:00
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. SéguinFew-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}+\...
2017-11-29T10:00:00+00:00
Author(s): J. Carlson, S. Gandolfi, U. van Kolck, and S. A. VitielloThe 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...
2017-11-29T10:00:00+00:00
Author(s): J. Emiliano Deustua, Jun Shen, and Piotr PiecuchWe 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...
2017-11-29T10:00:00+00:00
Author(s): V. A. Dzuba, V. V. Flambaum, and Y. V. StadnikIn 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...
2017-11-29T10:00:00+00:00
Author(s): D. D. Sukachev, A. Sipahigil, C. T. Nguyen, M. K. Bhaskar, R. E. Evans, F. Jelezko, and M. D. LukinThe 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...
2017-11-29T10:00:00+00:00
Author(s): Kirill Yu. Spasibko, Denis A. Kopylov, Victor L. Krutyanskiy, Tatiana V. Murzina, Gerd Leuchs, and Maria V. ChekhovaThe 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...