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Published: 2017-10-17T06:03:01+00:00
2017-10-16T10:00:00+00:00
Author(s): C. F. Roos, A. Alberti, D. Meschede, P. Hauke, and H. HäffnerA proposed set of experiments could offer a direct measurement of the fundamental quantum property that distinguishes fermions from bosons.
(image)2017-10-16T10:00:00+00:00
Author(s): B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)For the first time, researchers have detected both light and gravitational waves from the same event in space.
(image)2017-10-16T10:00:00+00:00
Author(s): Andreas Brandhuber, Martyna Kostacińska, Brenda Penante, and Gabriele TravagliniHiggs plus multigluon amplitudes in QCD can be computed in an effective Lagrangian description. In the infinite top-mass limit, an amplitude with a Higgs boson and $n$ gluons is computed by the form factor of the operator $\mathrm{Tr}{F}^{2}$. Up to two loops and for three gluons, its maximally tran...
2017-10-16T10:00:00+00:00
Author(s): Robert de Mello Koch, Phumudzo Rabambi, Randle Rabe, and Sanjaye RamgoolamWe develop general counting formulas for primary fields in free four dimensional (4D) scalar conformal field theory (CFT). Using a duality map between primary operators in scalar field theory and multivariable polynomial functions subject to differential constraints, we identify a sector of holomorp...
2017-10-16T10:00:00+00:00
Author(s): Bruno de la Torre, Martin Švec, Giuseppe Foti, Ondřej Krejčí, Prokop Hapala, Aran Garcia-Lekue, Thomas Frederiksen, Radek Zbořil, Andres Arnau, Héctor Vázquez, and Pavel JelínekHere we show scanning tunneling microscopy (STM), noncontact atomic force microscopy (AFM), and inelastic electron tunneling spectroscopy (IETS) measurements on an organic molecule with a CO-terminated tip at 5 K. The high-resolution contrast observed simultaneously in all channels unambiguously dem...
2017-10-16T10:00:00+00:00
Author(s): S. M. Collins, R. K. Leary, P. A. Midgley, R. Tovey, M. Benning, C.-B. Schönlieb, P. Rez, and M. M. J. TreacyElectron tomography bears promise for widespread determination of the three-dimensional arrangement of atoms in solids. However, it remains unclear whether methods successful for crystals are optimal for amorphous solids. Here, we explore the relative difficulty encountered in atomic-resolution tomo...
2017-10-16T10:00:00+00:00
Author(s): Thomas Ayral, Jaksa Vučičević, and Olivier ParcolletWe present an embedded-cluster method, based on the triply irreducible local expansion formalism. It turns the Fierz ambiguity, inherent to approaches based on a bosonic decoupling of local fermionic interactions, into a convergence criterion. It is based on the approximation of the three-leg vertex...
2017-10-13T10:00:00+00:00
Author(s): H. Sosa-Martinez, N. K. Lysne, C. H. Baldwin, A. Kalev, I. H. Deutsch, and P. S. JessenQuantum tomography is a critically important tool to evaluate quantum hardware, making it essential to develop optimized measurement strategies that are both accurate and efficient. We compare a variety of strategies using nearly pure test states. Those that are informationally complete for all stat...
2017-10-13T10:00:00+00:00
Author(s): Kaifeng Bu, Uttam Singh, Shao-Ming Fei, Arun Kumar Pati, and Junde WuThe operational characterization of quantum coherence is the cornerstone in the development of the resource theory of coherence. We introduce a new coherence quantifier based on maximum relative entropy. We prove that the maximum relative entropy of coherence is directly related to the maximum overl...
2017-10-13T10:00:00+00:00
Author(s): Yefeng Mei, Xianxin Guo, Luwei Zhao, and Shengwang DuWe report the demonstration of a mirrorless optical parametric oscillator with a tunable threshold in laser-cooled atoms with four-wave mixing (FWM) using electromagnetically induced transparency. Driven by two classical laser beams, the generated Stokes and anti-Stokes fields counterpropagate and b...
2017-10-13T10:00:00+00:00
Author(s): Masahiro Takeoka, Kaushik P. Seshadreesan, and Mark M. WildeWe consider quantum key distribution (QKD) and entanglement distribution using a single-sender multiple-receiver pure-loss bosonic broadcast channel. We determine the unconstrained capacity region for the distillation of bipartite entanglement and secret key between the sender and each receiver, whe...
2017-10-13T10:00:00+00:00
Author(s): Yao Lu, S. Chakram, N. Leung, N. Earnest, R. K. Naik, Ziwen Huang, Peter Groszkowski, Eliot Kapit, Jens Koch, and David I. SchusterWe autonomously stabilize arbitrary states of a qubit through parametric modulation of the coupling between a fixed frequency qubit and resonator. The coupling modulation is achieved with a tunable coupling design, in which the qubit and the resonator are connected in parallel to a superconducting q...
2017-10-13T10:00:00+00:00
Author(s): H. Kaufmann, T. Ruster, C. T. Schmiegelow, M. A. Luda, V. Kaushal, J. Schulz, D. von Lindenfels, F. Schmidt-Kaler, and U. G. PoschingerA four-qubit entangled state is created in a scalable ion trap system, with fidelity exceeding 90%.
(image)2017-10-13T10:00:00+00:00
Author(s): A. M. Sirunyan et al. (CMS Collaboration)Results are reported from a search for supersymmetric particles in proton-proton collisions in the final state with a single lepton, multiple jets, including at least one $b$-tagged jet, and large missing transverse momentum. The search uses a sample of proton-proton collision data at $\sqrt{s}=13\t...
2017-10-13T10:00:00+00:00
Author(s): A. M. Sirunyan et al. (CMS Collaboration)The differential production cross sections of ${B}^{±}$ mesons are measured via the exclusive decay channels ${B}^{±}→J/ψ{K}^{±}→{μ}^{+}{μ}^{−}{K}^{±}$ as a function of transverse momentum in $p$$p$ and Pb-Pb collisions at a center-of-mass energy $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$ pe...
2017-10-13T10:00:00+00:00
Author(s): Hao Xiong, Jinghui Gan, and Ying WuA Kuznetsov-Ma soliton that exhibits an unusual pulsating dynamics has attracted particular attention in hydrodynamics and plasma physics in the context of understanding nonlinear coherent phenomena. Here, we demonstrate theoretically the formation of a novel form of Kuznetsov-Ma soliton in a microf...
2017-10-13T10:00:00+00:00
Author(s): Sepideh Khodaparast, François Boulogne, Christophe Poulard, and Howard A. StoneInks of permanent markers and waterproof cosmetics create elastic thin films upon application on a surface. Such adhesive materials are deliberately designed to exhibit water-repellent behavior. Therefore, patterns made up of these inks become resistant to moisture and cannot be cleaned by water aft...
2017-10-13T10:00:00+00:00
Author(s): A. Leblanc, S. Monchocé, H. Vincenti, S. Kahaly, J.-L. Vay, and F. QuéréSpatial properties of high-order harmonic beams produced by high-intensity laser-matter interactions carry rich information on the physics of the generation process, and their detailed understanding is essential for applications of these light beams. We present a thorough study of these properties i...
2017-10-13T10:00:00+00:00
Author(s): Grzegorz SzamelWe propose a simple theory for the dynamics of model glass-forming fluids, which should be solvable using a mean-field-like approach. The theory is based on transparent physical assumptions, which can be tested in computer simulations. The theory predicts an ergodicity-breaking transition that is id...
2017-10-13T10:00:00+00:00
Author(s): Guoqing Chang, Su-Yang Xu, Xiaoting Zhou, Shin-Ming Huang, Bahadur Singh, Baokai Wang, Ilya Belopolski, Jiaxin Yin, Songtian Zhang, Arun Bansil, Hsin Lin, and M. Zahid HasanA new topological semimetal state is predicted, featuring three-dimensional band crossings that manifest as perpendicular, nontrivial links.
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Author(s): H. T. M. Nghiem and T. A. CostiWe investigate the time evolution of the Kondo resonance in response to a quench by applying the time-dependent numerical renormalization group (TDNRG) approach to the Anderson impurity model in the strong correlation limit. For this purpose, we derive within the TDNRG approach a numerically tractab...
2017-10-13T10:00:00+00:00
Author(s): Guanghui Cheng, Wei Qin, Meng-Hsien Lin, Laiming Wei, Xiaodong Fan, Huayang Zhang, Shangjr Gwo, Changgan Zeng, J. G. Hou, and Zhenyu ZhangThe interplays between different quasiparticles in solids lay the foundation for a wide spectrum of intriguing quantum effects, yet how the collective plasmon excitations affect the quantum transport of electrons remains largely unexplored. Here we provide the first demonstration that when the elect...
2017-10-13T10:00:00+00:00
Author(s): Yanhong Gu, Zhaoyu Liu, Tao Xie, Wenliang Zhang, Dongliang Gong, Ding Hu, Xiaoyan Ma, Chunhong Li, Lingxiao Zhao, Lifang Lin, Zhuang Xu, Guotai Tan, Genfu Chen, Zi Yang Meng, Yi-feng Yang, Huiqian Luo, and Shiliang LiHigh-temperature superconductivity is closely adjacent to a long-range antiferromagnet, which is called a parent compound. In cuprates, all parent compounds are alike and carrier doping leads to superconductivity, so a unified phase diagram can be drawn. However, the properties of parent compounds f...
2017-10-13T10:00:00+00:00
Author(s): Harini Pattabhiraman, Guido Avvisati, and Marjolein DijkstraUsing computer simulations, we investigate the phase behavior of a system of particles interacting with a remarkably simple repulsive square-shoulder pair potential and report the formation of a novel (and stable) pyrochlorelike crystal phase. The lattice structure of the pyrochlorelike phase formed...
2017-10-13T10:00:00+00:00
Author(s): Alessandro Romito and Yuval GefenEntanglement in quantum mechanics contradicts local realism and is a manifestation of quantum nonlocality. Its presence can be detected through the violation of Bell, or Clauser-Horne-Shimony-Holt (CHSH) inequalities. Paradigmatic quantum systems provide examples of both, nonentangled and entangled ...
2017-10-13T10:00:00+00:00
Author(s): Y.-J. Chen, G. M. Muñoz Caro, S. Aparicio, A. Jiménez-Escobar, J. Lasne, A. Rosu-Finsen, M. R. S. McCoustra, A. M. Cassidy, and D. FieldThe absorption of light to create Wannier-Mott excitons is a fundamental feature dictating the optical and photovoltaic properties of low band gap, high permittivity semiconductors. Such excitons, with an electron-hole separation an order of magnitude greater than lattice dimensions, are largely lim...
2017-10-12T10:00:00+00:00
Author(s): Shiqian Ding, Gleb Maslennikov, Roland Hablützel, Huanqian Loh, and Dzmitry MatsukevichA strong nonlinear coupling between harmonic oscillators is highly desirable for quantum information processing and quantum simulation, but is difficult to achieve in many physical systems. Here, we exploit the Coulomb interaction between two trapped ions to achieve strong nonlinear coupling between...
2017-10-12T10:00:00+00:00
Author(s): Debajyoti Choudhury, Anirban Kundu, Rusa Mandal, and Rahul SinhaIt is a challenging task to explain, in terms of a simple and compelling new physics scenario, the intriguing discrepancies between the standard model expectations and the data for the neutral-current observables ${R}_{K}$ and ${R}_{{K}^{*}}$, as well as the charged-current observables $R(D)$ and $R...
2017-10-12T10:00:00+00:00
Author(s): J. Brox, P. Kiefer, M. Bujak, T. Schaetz, and H. LandaResearchers have directed the motion of a domain-wall-like topological defect through a crystal of trapped ions.
(image)2017-10-12T10:00:00+00:00
Author(s): J. Squire, M. W. Kunz, E. Quataert, and A. A. SchekochihinUsing two-dimensional hybrid-kinetic simulations, we explore the nonlinear “interruption” of standing and traveling shear-Alfvén waves in collisionless plasmas. Interruption involves a self-generated pressure anisotropy removing the restoring force of a linearly polarized Alfvénic perturbation, and ...
2017-10-12T10:00:00+00:00
Author(s): Ludovic Spiteri and René MessinaWe report a new phase called clinohexagonal prism (CHP) that accounts for all the ground states of dipolar hard spheres prepared at any density. This phase merely consists of an oblique prismatic lattice with a hexagonal base. Our calculations show that at intermediate densities, a special close pac...
2017-10-12T10:00:00+00:00
Author(s): P. Lázpita, J. M. Barandiarán, J. Gutiérrez, C. Mondelli, A. Sozinov, and V. A. ChernenkoPolarized neutron scattering has been used to obtain the magnetic moment at specific crystallographic sites of the austenitic and martensitic phases of two nonstoichiometric Ni-Mn-Ga single crystals with close composition. These alloys have been chosen because they exhibit different structures in th...
2017-10-12T10:00:00+00:00
Author(s): Michael Schecter, Olav F. Syljuåsen, and Jens PaaskeWe study classical two-dimensional frustrated Heisenberg models with generically incommensurate ground states. A new theory for the lattice-nematic “order by disorder” transition is developed based on the self-consistent determination of the effective exchange coupling bonds. In our approach, fluctu...
2017-10-12T10:00:00+00:00
Author(s): Matthias Gohlke, Ruben Verresen, Roderich Moessner, and Frank PollmannWe introduce a matrix-product state based method to efficiently obtain dynamical response functions for two-dimensional microscopic Hamiltonians. We apply this method to different phases of the Kitaev-Heisenberg model and identify characteristic dynamical features. In the ordered phases proximate to...
2017-10-12T10:00:00+00:00
Author(s): N. Magnani, R. Eloirdi, F. Wilhelm, E. Colineau, J.-C. Griveau, A. B. Shick, G. H. Lander, A. Rogalev, and R. CaciuffoWe measure x-ray magnetic circular dichroism (XMCD) spectra at the Pu ${M}_{4,5}$ absorption edges from a newly prepared high-quality single crystal of the heavy-fermion superconductor $^{242}\mathrm{Pu}{\mathrm{CoGa}}_{5}$, exhibiting a critical temperature ${T}_{c}=18.7\text{ }\text{ }\mathrm{K}$....
2017-10-12T10:00:00+00:00
Author(s): F. Cagnetta, F. Corberi, G. Gonnella, and A. SumaWe study the statistics, in stationary conditions, of the work ${W}_{τ}$ done by the active force in different systems of self-propelled particles in a time $τ$. We show the existence of a critical value ${W}_{τ}^{†}$ such that fluctuations with ${W}_{τ}>{W}_{τ}^{†}$ correspond to configurations ...
2017-10-12T10:00:00+00:00
Author(s): Ruslan P. Kurta, Jeffrey J. Donatelli, Chun Hong Yoon, Peter Berntsen, Johan Bielecki, Benedikt J. Daurer, Hasan DeMirci, Petra Fromme, Max Felix Hantke, Filipe R. N. C. Maia, Anna Munke, Carl Nettelblad, Kanupriya Pande, Hemanth K. N. Reddy, Jonas A. Sellberg, Raymond G. Sierra, Martin Svenda, Gijs van der Schot, Ivan A. Vartanyants, Garth J. Williams, P. Lourdu Xavier, Andrew Aquila, Peter H. Zwart, and Adrian P. MancusoWe use extremely bright and ultrashort pulses from an x-ray free-electron laser (XFEL) to measure correlations in x rays scattered from individual bioparticles. This allows us to go beyond the traditional crystallography and single-particle imaging approaches for structure investigations. We employ ...
2017-10-11T10:00:00+00:00
Author(s): A. Karabanov, D. C. Rose, W. Köckenberger, J. P. Garrahan, and I. LesanovskyWe study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized nonequilibrium states in nuclear magnetic resonance. We analyze the stationary states of the dynamics, desc...
2017-10-11T10:00:00+00:00
Author(s): Nadine Meyer, Harry Proud, Marisa Perea-Ortiz, Charlotte O’Neale, Mathis Baumert, Michael Holynski, Jochen Kronjäger, Giovanni Barontini, and Kai BongsJones-Roberts solitons are the only known class of stable dark solitonic solutions of the nonlinear Schrödinger equation in two and three dimensions. They feature a distinctive elongated elliptical shape that allows them to travel without change of form. By imprinting a triangular phase pattern, we ...
2017-10-11T10:00:00+00:00
Author(s): Elia Schneider, Luke Dai, Robert Q. Topper, Christof Drechsel-Grau, and Mark E. TuckermanThe generation of free energy landscapes corresponding to conformational equilibria in complex molecular systems remains a significant computational challenge. Adding to this challenge is the need to represent, store, and manipulate the often high-dimensional surfaces that result from rare-event sam...
2017-10-11T10:00:00+00:00
Author(s): David J. Luitz, François Huveneers, and Wojciech De RoeckNumerical simulations show that an imperfection as small as three units can destabilize the many-body localized phase of a one-dimensional chain.
(image)2017-10-11T10:00:00+00:00
Author(s): J. Currie, A. Gehrmann-De Ridder, T. Gehrmann, E. W. N. Glover, A. Huss, and J. PiresWe present the calculation of dijet production, doubly differential in dijet mass ${m}_{jj}$ and rapidity difference $|{y}^{*}|$, at leading color in all partonic channels at next-to-next-to-leading order (NNLO) in perturbative QCD. We consider the long-standing problems associated with scale choice...
2017-10-11T10:00:00+00:00
Author(s): Tomás Ramos and Juan José García-RipollIn this work we develop an experimental procedure to interrogate the single- and multiphoton scattering matrices of an unknown quantum system interacting with propagating photons. Our proposal requires coherent state laser or microwave inputs and homodyne detection at the scatterer’s output, and pro...
2017-10-11T10:00:00+00:00
Author(s): Xiaojue Zhu, Richard J. A. M. Stevens, Roberto Verzicco, and Detlef LohseIn thermal convection, roughness is often used as a means to enhance heat transport, expressed in Nusselt number. Yet there is no consensus on whether the Nusselt vs Rayleigh number scaling exponent ($\mathrm{Nu}∼{\mathrm{Ra}}^{β}$) increases or remains unchanged. Here we numerically investigate tur...
2017-10-11T10:00:00+00:00
Author(s): Marcel Moura, Knut Jørgen Måløy, Eirik Grude Flekkøy, and Renaud ToussaintIn this Letter we give experimental grounding for the remarkable observation made by Furuberg et al. [Phys. Rev. Lett. 61, 2117 (1988)] of an unusual dynamic scaling for the pair correlation function $N(r,t)$ during the slow drainage of a porous medium. Those authors use an invasion percolation algo...
2017-10-11T10:00:00+00:00
Author(s): Zuhuang Chen, Zhanghui Chen, Z. Q. Liu, M. E. Holtz, C. J. Li, X. Renshaw Wang, W. M. Lü, M. Motapothula, L. S. Fan, J. A. Turcaud, L. R. Dedon, C. Frederick, R. J. Xu, R. Gao, A. T. N’Diaye, E. Arenholz, J. A. Mundy, T. Venkatesan, D. A. Muller, L.-W. Wang, Jian Liu, and L. W. MartinEmergent phenomena at polar-nonpolar oxide interfaces have been studied intensely in pursuit of next-generation oxide electronics and spintronics. Here we report the disentanglement of critical thicknesses for electron reconstruction and the emergence of ferromagnetism in polar-mismatched ${\mathrm{...
2017-10-11T10:00:00+00:00
Author(s): K. Ono, G. Giavaras, T. Tanamoto, T. Ohguro, X. Hu, and F. NoriWe study hole spin resonance in a $p$-channel silicon metal-oxide-semiconductor field-effect transistor. In the subthreshold region, the measured source-drain current reveals a double dot in the channel. The observed spin resonance spectra agree with a model of strongly coupled two-spin states in th...
2017-10-11T10:00:00+00:00
Author(s): Zhenyue Zhu, P. A. Maksimov, Steven R. White, and A. L. ChernyshevWe suggest that a randomization of the pseudodipolar interaction in the spin-orbit-generated low-energy Hamiltonian of ${\mathrm{YbMgGaO}}_{4}$ due to an inhomogeneous charge environment from a natural mixing of ${\mathrm{Mg}}^{2+}$ and ${\mathrm{Ga}}^{3+}$ can give rise to orientational spin disord...
2017-10-11T10:00:00+00:00
Author(s): Lilian C. Hsiao, Safa Jamali, Emmanouil Glynos, Peter F. Green, Ronald G. Larson, and Michael J. SolomonTo assess the role of particle roughness in the rheological phenomena of concentrated colloidal suspensions, we develop model colloids with varying surface roughness length scales up to 10% of the particle radius. Increasing surface roughness shifts the onset of both shear thickening and dilatancy t...
2017-10-11T10:00:00+00:00
Author(s): J. Copperman, M. Dinpajooh, E. R. Beyerle, and M. G. GuenzaWe investigate the universal scaling of protein fluctuation dynamics with a site-specific diffusive model of protein motion, which predicts an initial subdiffusive regime in the configurational relaxation. The long-time dynamics of proteins is controlled by an activated regime. We argue that the hie...
2017-10-11T10:00:00+00:00
Author(s): Karl Wienand, Erwin Frey, and Mauro MobiliaEnvironment plays a fundamental role in the competition for resources, and hence in the evolution of populations. Here, we study a well-mixed, finite population consisting of two strains competing for the limited resources provided by an environment that randomly switches between states of abundance...
2017-10-11T10:00:00+00:00
Author(s): G. W. Bailey, N. K. Timofeyuk, and J. A. Tostevin2017-10-10T10:00:00+00:00
Author(s): S. Huang, Y. Ding, Y. Feng, E. Hemsing, Z. Huang, J. Krzywinski, A. A. Lutman, A. Marinelli, T. J. Maxwell, and D. ZhuX-ray free-electron lasers have been used to generate single spikes of hard x rays that are only 200 attoseconds long.
(image)2017-10-10T10:00:00+00:00
Author(s): M. H. Lee, C.-P. Chang, F.-T. Huang, G. Y. Guo, B. Gao, C. H. Chen, S.-W. Cheong, and M.-W. ChuHybrid improper ferroelectricity (HIF) denotes a new class of polar instability by the mixture of two octahedral-distortion modes and can feature the coexistence of abundant head-to-head and tail-to-tail polar domains, of which the domain walls tend to be charged due to the respective screening char...
2017-10-10T10:00:00+00:00
Author(s): Z. R. Kudrynskyi, M. A. Bhuiyan, O. Makarovsky, J. D. G. Greener, E. E. Vdovin, Z. D. Kovalyuk, Y. Cao, A. Mishchenko, K. S. Novoselov, P. H. Beton, L. Eaves, and A. PatanèInduced transfer of charge carriers is demonstrated in a graphene-based field-effect transistor, leading to a quantum Hall plateau.
(image)2017-10-09T10:00:00+00:00
Author(s): William B. Cairncross, Daniel N. Gresh, Matt Grau, Kevin C. Cossel, Tanya S. Roussy, Yiqi Ni, Yan Zhou, Jun Ye, and Eric A. CornellNew precision experiments using trapped molecular ions provide an alternative method for determining if the electron has an electric dipole moment.
(image)2017-10-06T10:00:00+00:00
Author(s): Davide Girolami, Tommaso Tufarelli, and Cristian E. SusaWe propose an information-theoretic framework to quantify multipartite correlations in classical and quantum systems, answering questions such as what is the amount of seven-partite correlations in a given state of ten particles? We identify measures of genuine multipartite correlations, i.e., stati...
2017-10-06T10:00:00+00:00
Author(s): Gael Sentís, John Calsamiglia, and Ramon Muñoz-TapiaThe detection of change points is a pivotal task in statistical analysis. In the quantum realm, it is a new primitive where one aims at identifying the point where a source that supposedly prepares a sequence of particles in identical quantum states starts preparing a mutated one. We obtain the opti...
2017-10-06T10:00:00+00:00
Author(s): B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)The first simultaneous detection of gravitational radiation by the LIGO and Virgo detectors greatly improves localization of the source and permits a novel test of general relativity.
(image)2017-10-06T10:00:00+00:00
Author(s): C. Alexandrou, M. Constantinou, K. Hadjiyiannakou, K. Jansen, C. Kallidonis, G. Koutsou, A. Vaquero Avilés-Casco, and C. WieseWe determine within lattice QCD the nucleon spin carried by valence and sea quarks and gluons. The calculation is performed using an ensemble of gauge configurations with two degenerate light quarks with mass fixed to approximately reproduce the physical pion mass. We find that the total angular mom...
2017-10-06T10:00:00+00:00
Author(s): Menno Bokdam, Jonathan Lahnsteiner, Benjamin Ramberger, Tobias Schäfer, and Georg KresseWhich density functional is the “best” for structure simulations of a particular material? A concise, first principles, approach to answer this question is presented. The random phase approximation (RPA)—an accurate many body theory—is used to evaluate various density functionals. To demonstrate and...
2017-10-06T10:00:00+00:00
Author(s): Ivor Lončarić, Gernot Füchsel, J. I. Juaristi, and Peter SaalfrankComplete sticking at low incidence energies and broad angular scattering distributions at higher energies are often observed in molecular beam experiments on gas-surface systems which feature a deep chemisorption well and lack early reaction barriers. Although CO binds strongly on Ru(0001), scatteri...
2017-10-06T10:00:00+00:00
Author(s): P. Gogoi, D. Kamenskyi, D. D. Arslanov, R. T. Jongma, W. J. van der Zande, B. Redlich, A. F. G. van der Meer, H. Engelkamp, P. C. M. Christianen, and J. C. MaanThe ac magnetoconductance of bulk InSb at THz frequencies in high magnetic fields, as measured by the transmission of THz radiation, shows a field-induced transmission, which at high temperatures ($≈100\text{ }\text{ }\mathrm{K}$) is well explained with classical magnetoplasma effects (helicon waves...
2017-10-06T10:00:00+00:00
Author(s): Karel Proesmans, Hans Vandebroek, and Christian Van den BroeckInspired by Kubo-Anderson Markov processes, we introduce a new class of transfer matrices whose largest eigenvalue is determined by a simple explicit algebraic equation. Applications include the free energy calculation for various equilibrium systems and a general criterion for perfect harmonicity, ...
2017-10-06T10:00:00+00:00
Author(s): Hsin-Fang Hsu, Eberhard Bodenschatz, Christian Westendorf, Azam Gholami, Alain Pumir, Marco Tarantola, and Carsten BetaThe chemotactic motion of eukaryotic cells such as leukocytes or metastatic cancer cells relies on membrane protrusions driven by the polymerization and depolymerization of actin. Here we show that the response of the actin system to a receptor stimulus is subject to a threshold value that varies st...
2017-10-05T10:00:00+00:00
Author(s): Alexander Streltsov, Swapan Rana, Paul Boes, and Jens EisertQuantum coherence is an essential feature of quantum mechanics which is responsible for the departure between the classical and quantum world. The recently established resource theory of quantum coherence studies possible quantum technological applications of quantum coherence, and limitations that ...
2017-10-05T10:00:00+00:00
Author(s): Satoshi Iso, Pasquale D. Serpico, and Kengo ShimadaIf the electroweak sector of the standard model is described by classically conformal dynamics, the early Universe evolution can be substantially altered. It is already known that—contrarily to the standard model case—a first-order electroweak phase transition may occur. Here we show that, depending...
2017-10-05T10:00:00+00:00
Author(s): Glen EvenblyWe propose a new class of tensor network state as a model for the $\mathrm{AdS}/\mathrm{CFT}$ correspondence and holography. This class is demonstrated to retain key features of the multiscale entanglement renormalization ansatz (MERA), in that they describe quantum states with algebraic correlation...
2017-10-05T10:00:00+00:00
Author(s): Brando Bellazzini, Alberto Mariotti, Diego Redigolo, Filippo Sala, and Javi SerraWe study the effective theory of a generic class of hidden sectors where supersymmetry is broken together with an approximate $R$-symmetry at low energy. The light spectrum contains the gravitino and the pseudo-Nambu-Goldstone boson of the $R$-symmetry, the $R$-axion. We derive new model-independent...
2017-10-05T10:00:00+00:00
Author(s): S. Abreu, F. Febres Cordero, H. Ita, M. Jaquier, B. Page, and M. ZengWe present the first numerical computation of two-loop amplitudes based on the unitarity method. As a proof of principle, we compute the four-gluon process in the leading-color approximation. We discuss the new method, analyze its numerical properties, and apply it to reconstruct the analytic form o...
2017-10-05T10:00:00+00:00
Author(s): Catherine E. Klauss, Xin Xie, Carlos Lopez-Abadia, José P. D’Incao, Zoran Hadzibabic, Deborah S. Jin, and Eric A. CornellWe convert a strongly interacting ultracold Bose gas into a mixture of atoms and molecules by sweeping the interactions from resonant to weak. By analyzing the decay dynamics of the molecular gas, we show that in addition to Feshbach dimers it contains Efimov trimers. Typically around 8% of the tota...
2017-10-05T10:00:00+00:00
Author(s): Andrey Gromov, Scott D. Geraedts, and Barry BradlynWe construct a low energy effective theory of anisotropic fractional quantum Hall (FQH) states. We develop a formalism similar to that used in the bimetric approach to massive gravity, and apply it to describe Abelian anisotropic FQH states in the presence of external electromagnetic and geometric b...
2017-10-05T10:00:00+00:00
Author(s): Q. H. Chen, J. M. Lu, L. Liang, O. Zheliuk, A. Ali, P. Sheng, and J. T. YeElectric fields applied on either side of a thin, semiconducting transition-metal dichalcogenide create a superconducting layer atop a metallic layer within the material.
(image)2017-10-05T10:00:00+00:00
Author(s): Seongjin Ahn, E. J. Mele, and Hongki MinWe study the frequency-dependent conductivity of nodal line semimetals (NLSMs), focusing on the effects of carrier density and energy dispersion on the nodal line. We find that the low-frequency conductivity has a rich spectral structure which can be understood using scaling rules derived from the g...
2017-10-05T10:00:00+00:00
Author(s): Eric I. Rosenthal, Benjamin J. Chapman, Andrew P. Higginbotham, Joseph Kerckhoff, and K. W. LehnertWe introduce a method for breaking Lorentz reciprocity based upon the noncommutation of frequency conversion and delay. The method requires no magnetic materials or resonant physics, allowing for the design of scalable and broadband nonreciprocal circuits. With this approach, two types of gyrators—u...
2017-10-05T10:00:00+00:00
Author(s): Yonathan Efroni, Shahal Ilani, and Erez BergWe show that carbon nanotubes (CNT) can be driven through a topological phase transition using either strain or a magnetic field. This can naturally lead to Jackiw-Rebbi soliton states carrying fractionalized charges, similar to those found in a domain wall in the Su-Schrieffer-Heeger model, in a se...
2017-10-04T10:00:00+00:00
Author(s): Carlos Pérez-Espigares, Matteo Marcuzzi, Ricardo Gutiérrez, and Igor LesanovskyWe explore the nonequilibrium evolution and stationary states of an open many-body system that displays epidemic spreading dynamics in a classical and a quantum regime. Our study is motivated by recent experiments conducted in strongly interacting gases of highly excited Rydberg atoms where the faci...
2017-10-04T10:00:00+00:00
Author(s): Simone Gasparinetti, Marek Pechal, Jean-Claude Besse, Mintu Mondal, Christopher Eichler, and Andreas WallraffWe use a three-level artificial atom in the ladder configuration as a source of correlated, single microwave photons of different frequency. The artificial atom, a transmon-type superconducting circuit, is driven at the two-photon transition between ground and second-excited state, and embedded into...
2017-10-04T10:00:00+00:00
Author(s): Peter GrassbergerAlthough the title seems self-contradictory, it does not contain a misprint. The model we study is a seemingly minor modification of the “true self-avoiding walk” model of Amit, Parisi, and Peliti in two dimensions. The walks in it are self-repelling up to a characteristic time ${T}^{*}$ (which depe...
2017-10-04T10:00:00+00:00
Author(s): Alexander Schnell, Daniel Vorberg, Roland Ketzmerick, and André EckardtWe investigate theoretically a one-dimensional ideal Bose gas that is driven into a steady state far from equilibrium via the coupling to two heat baths: a global bath of temperature $T$ and a “hot needle,” a bath of temperature ${T}_{h}≫T$ with localized coupling to the system. Remarkably, this sys...
2017-10-04T10:00:00+00:00
Author(s): Andrea Falcón-Cortés, Denis Boyer, Luca Giuggioli, and Satya N. MajumdarWe solve an adaptive search model where a random walker or Lévy flight stochastically resets to previously visited sites on a $d$-dimensional lattice containing one trapping site. Because of reinforcement, a phase transition occurs when the resetting rate crosses a threshold above which nondiffusive...
2017-10-04T10:00:00+00:00
Author(s): Simone Pigolotti, Izaak Neri, Édgar Roldán, and Frank JülicherWe derive an Itô stochastic differential equation for entropy production in nonequilibrium Langevin processes. Introducing a random-time transformation, entropy production obeys a one-dimensional drift-diffusion equation, independent of the underlying physical model. This transformation allows us to...
2017-10-04T10:00:00+00:00
Author(s): R. T. Harding, S. Zhou, J. Zhou, T. Lindvall, W. K. Myers, A. Ardavan, G. A. D. Briggs, K. Porfyrakis, and E. A. LairdThe endohedral fullerene $^{15}\mathrm{N}@{\mathrm{C}}_{60}$ has narrow electron paramagnetic resonance lines which have been proposed as the basis for a condensed-matter portable atomic clock. We measure the low-frequency spectrum of this molecule, identifying and characterizing a clock transition ...
2017-10-04T10:00:00+00:00
Author(s): A. M. Sirunyan et al. (CMS Collaboration)A search for charged Higgs bosons produced via vector boson fusion and decaying into $W$ and $Z$ bosons using proton-proton collisions at $\sqrt{s}=13\text{ }\text{ }\mathrm{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $15.2\text{ }\text{ }{\mathrm{fb}}^{−1}$ collec...
2017-10-04T10:00:00+00:00
Author(s): Jeff A. Dror, Robert Lasenby, and Maxim PospelovWe derive new constraints on light vectors coupled to standard model (SM) fermions, when the corresponding SM current is broken by the chiral anomaly. The cancellation of the anomaly by heavy fermions results, in the low-energy theory, in Wess-Zumino–type interactions between the new vector and the ...
2017-10-04T10:00:00+00:00
Author(s): Shih-Wen Feng, Chun-Yuan Cheng, Chen-Yeh Wei, Jen-Hung Yang, Yen-Ru Chen, Ya-Wen Chuang, Yang-Hsiung Fan, and Chih-Sung ChuuSingle photon emitters are indispensable to photonic quantum technologies. Here, we demonstrate waveform-controlled high-purity single photons from room-temperature colloidal quantum dots. The purity of the single photons does not vary with the excitation power, thereby allowing the generation rate ...
2017-10-04T10:00:00+00:00
Author(s): A. González-Tudela and J. I. CiracWe show that the coupling of quantum emitters to a two-dimensional reservoir with a simple band structure gives rise to exotic quantum dynamics with no analogue in other scenarios and which cannot be captured by standard perturbative treatments. In particular, for a single quantum emitter with its t...
2017-10-04T10:00:00+00:00
Author(s): Michael Gomez, Derek E. Moulton, and Dominic VellaWe demonstrate the passive control of viscous flow in a channel by using an elastic arch embedded in the flow. Depending on the fluid flux, the arch may “snap” between two states—constricting and unconstricting—that differ in hydraulic conductivity by up to an order of magnitude. We use a combinatio...
2017-10-04T10:00:00+00:00
Author(s): Martin Gmitra and Jaroslav FabianProximity orbital and spin-orbit effects of bilayer graphene on monolayer ${\mathrm{WSe}}_{2}$ are investigated from first principles. We find that the built-in electric field induces an orbital band gap of about 10 meV in bilayer graphene. Remarkably, the proximity spin-orbit splitting for holes is...
2017-10-04T10:00:00+00:00
Author(s): S. A. Parameswaran and S. GopalakrishnanNon-Fermi liquids are metals that cannot be adiabatically deformed into free fermion states. We argue for the existence of “non-Fermi glasses,” phases of interacting disordered fermions that are fully many-body localized (MBL), yet cannot be deformed into an Anderson insulator without an eigenstate ...
2017-10-04T10:00:00+00:00
Author(s): Dmitry Yudin, Dmitry R. Gulevich, and Mikhail TitovAn external off-resonant pumping is proposed as a tool to control the Dzyaloshinskii-Moriya interaction (DMI) in ferromagnetic layers with strong spin-orbit coupling. Combining theoretical analysis with numerical simulations for an $s\text{−}d$-like model, we demonstrate that linearly polarized off-...
2017-10-04T10:00:00+00:00
Author(s): W. J. M. Kort-KampThe recent synthesis of two-dimensional staggered materials opens up burgeoning opportunities to study optical spin-orbit interactions in semiconducting Dirac-like systems. We unveil topological phase transitions in the photonic spin Hall effect in the graphene family materials. It is shown that an ...
2017-10-04T10:00:00+00:00
Author(s): Berthold Jäck, Jacob Senkpiel, Markus Etzkorn, Joachim Ankerhold, Christian R. Ast, and Klaus KernWe have investigated the phase dynamics of a superconducting tunnel junction at ultralow temperatures in the presence of high damping, where the interaction with environmental degrees of freedom represents the leading energy scale. In this regime, theory predicts the dynamics to follow a generalizat...
2017-10-04T10:00:00+00:00
Author(s): I. Kriuchevskyi, J. P. Wittmer, H. Meyer, and J. BaschnagelUsing molecular dynamics simulation of a standard coarse-grained polymer glass model, we investigate by means of the stress-fluctuation formalism the shear modulus $μ$ as a function of temperature $T$ and sampling time $\mathrm{Δ}t$. While the ensemble-averaged modulus $μ(T)$ is found to decrease co...
2017-10-04T10:00:00+00:00
Author(s): Antonio Lasanta, Francisco Vega Reyes, Antonio Prados, and Andrés SantosUnder certain conditions, two samples of fluid at different initial temperatures present a counterintuitive behavior known as the Mpemba effect: it is the hotter system that cools sooner. Here, we show that the Mpemba effect is present in granular fluids, both in uniformly heated and in freely cooli...
2017-10-04T10:00:00+00:00
Author(s): Julien Petit, Ben Lauwens, Duccio Fanelli, and Timoteo CarlettiThe process of pattern formation for a multispecies model anchored on a time varying network is studied. A nonhomogeneous perturbation superposed to an homogeneous stable fixed point can be amplified following the Turing mechanism of instability, solely instigated by the network dynamics. By properl...
2017-10-03T10:00:00+00:00
Author(s): Karen Alim, Shima Parsa, David A. Weitz, and Michael P. BrennerThe relationship between the microstructure of a porous medium and the observed flow distribution is still a puzzle. We resolve it with an analytical model, where the local correlations between adjacent pores, which determine the distribution of flows propagated from one pore downstream, predict the...
2017-10-03T10:00:00+00:00
Author(s): Andrew Dittmore, Sumitabha Brahmachari, Yasuharu Takagi, John F. Marko, and Keir C. NeumanSingle base-pair mismatches in DNA can be pinpointed by twisting the molecule until it buckles.
(image)2017-10-02T10:00:00+00:00
Author(s): Raphael BoussoI derive a universal upper bound on the capacity of any communication channel between two distant systems. The Holevo quantity, and hence the mutual information, is at most of order $E\mathrm{Δ}t/ℏ$, where $E$ is the average energy of the signal, and $\mathrm{Δ}t$ is the amount of time for which det...
2017-10-02T10:00:00+00:00
Author(s): Katharine Hyatt, James R. Garrison, and Bela BauerTensor networks impose a notion of geometry on the entanglement of a quantum system. In some cases, this geometry is found to reproduce key properties of holographic dualities, and subsequently much work has focused on using tensor networks as tractable models for holographic dualities. Conventional...