Latest in cond-mat.stat-mech

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Energetic footprints of irreversibility in the quantum regimeJul 15 2019The unavoidable presence of irreversibility in classical thermodynamic processes carries two energetic footprints - the reduction of extractable work from the optimal, reversible case, and the generation of a surplus of heat that is irreversibly dissipated ... More
An alternative flow equation for the functional renormalization groupJul 15 2019We derive an alternative to the Wetterich-Morris-Ellwanger equation by means of the two-particle irreducible (2PI) effective action, exploiting the method of external sources due to Garbrecht and Millington. The latter allows the two-point source of the ... More
Emergence of a bicritical end point in the random crystal field Blume-Capel modelJul 15 2019We obtain the phase diagram for the Blume-Capel model with bimodal distribution for random crystal fields, in the space of three fields: temperature, crystal field and magnetic field. We find that three critical lines meet at a tricritical point, but ... More
Geometric phase and topological phase diagram of the one-dimensional $XXZ$ Heisenberg spin chain in a longitudinal fieldJul 15 2019In this paper, we determine the geometric phase for the one-dimensional $XXZ$ Heisenberg chain with spin-$1/2$, the exchange couple $J$ and the spin anisotropy parameter $\Delta$ in a longitudinal field(LF) with the reduced field strength $h$. Using the ... More
Work statistics for sudden quenches in interacting quantum many-body systemsJul 14 2019Work in isolated systems, defined by the two projective energy measurement scheme, is a random variable whose the distribution function obeys the celebrated fluctuation theorems of Crooks and Jarzynski. In this study, we provide a simple way to calculate ... More
BKT-paired phase in coupled XY modelsJul 14 2019We study the effect of a linear tunneling coupling between 2D systems, each separately exhibiting the topological Berezinskii-Kosterlitz-Thouless (BKT) transition. In the uncoupled limit, there are two phases: one where the 1-body correlation functions ... More
Thermodynamic uncertainty relation for underdamped Langevin systems driven by a velocity-dependent forceJul 14 2019Recently, it has been shown that there is a trade-off relation between thermodynamic cost and current fluctuations, referred to as the thermodynamic uncertainty relation (TUR). The TUR has been derived for various processes, such as discrete-time Markov ... More
Nature of the randomness-induced quantum spin liquids in two dimensionsJul 14 2019The nature of the randomness-induced quantum spin liquid state, the random-singlet state, is investigated in two dimensions (2D) by means of the exact-diagonalization and the Hams-de Raedt methods for several frustrated lattices, e.g., the triangular, ... More
Cluster nonequilibrium relaxation in quantum phase transition in the two-dimensional $S=1/2$ dimerized antiferromagnetic Heisenberg modelJul 14 2019Recently the present authors showed that the stretched-exponential critical relaxation is widely observed in classical spin systems in the nonequilibrium relaxation process of cluster algorithms. In the present article we find that this behavior can be ... More
Zeros of ferromagnetic 2-spin systemsJul 14 2019We study zeros of the partition functions of ferromagnetic 2-state spin systems in terms of the external field, and obtain new zero-free regions of these systems via a refinement of Asano's and Ruelle's contraction method. The strength of our results ... More
Polymerization induces non-Gaussian diffusionJul 12 2019Recent theoretical modeling offers a unified picture for the description of stochastic processes characterized by a crossover from anomalous to normal behavior. This is particularly welcome, as a growing number of experiments suggest the crossover to ... More
Rectification of energy and motion in non-equilibrium parity violating metamaterialsJul 12 2019Uncovering new mechanisms for rectification of stochastic fluctuations has been a longstanding problem in non-equilibrium statistical mechanics. Here, using a model parity violating metamaterial that is allowed to interact with a bath of active energy ... More
How range residency and long-range perception change encounter ratesJul 12 2019Encounter rates link movement strategies to intra- and inter-specific interactions, and therefore translate individual movement behavior into higher-level ecological processes. Indeed, a large body of interacting population theory rests on the law of ... More
Kinetics of thermal Mott transitions in the Hubbard modelJul 12 2019We present the first-ever microscopic dynamical simulation of the temperature-controlled Mott metal-insulator transition in the Hubbard model. By combining the efficient Gutzwiller method with molecular dynamics simulations, we demonstrate that the transformation ... More
Relevance of topological disorder on the directed percolation phase transitionJul 12 2019Despite decades of research, the precise role of topological disorder in critical phenomena has yet to be fully understood. A major contribution has been the work by Barghathi and Vojta, which uses spatial correlations to explain puzzling earlier results. ... More
Which wavenumbers determine the thermodynamic stability of soft matter quasicrystals?Jul 12 2019For soft matter to form quasicrystals an important ingredient is to have two characteristic lengthscales in the interparticle interactions. To be more precise, for stable quasicrystals, periodic modulations of the local density distribution with two particular ... More
Critical Scaling and Aging near the Flux Line Depinning TransitionJul 12 2019We utilize Langevin molecular dynamics simulations to study dynamical critical behavior of magnetic flux lines near the depinning transition in type-II superconductors subject to randomly distributed attractive point defects. We employ a coarse-grained ... More
Phase-field modeling of crystal nucleation in undercooled liquids -- A reviewJul 12 2019We review how phase-field models contributed to the understanding of various aspects of crystal nucleation including homogeneous and heterogeneous processes, and their role in microstructure evolution. We recall results obtained both by the conventional ... More
Optimal paths of non-equilibrium stochastic fields: the Kardar-Parisi-Zhang interface as a test caseJul 12 2019Atypically large fluctuations in macroscopic non-equilibrium systems continue to attract interest. Their probability can often be determined by the optimal fluctuation method (OFM). The OFM brings about a conditional variational problem, the solution ... More
Asymptotic Reversibility of Thermal Operations for Interacting Quantum Spin Systems via Generalized Quantum Stein's LemmaJul 12 2019For quantum spin systems in any spatial dimension with a local, translation-invariant Hamiltonian, we prove that asymptotic state convertibility from a quantum state to another one by a thermodynamically feasible class of quantum dynamics, called thermal ... More
Macroscopic Thermodynamic Reversibility in Quantum Many-Body SystemsJul 12 2019The resource theory of thermal operations, an established model for small-scale thermodynamics, provides an extension of equilibrium thermodynamics to nonequilibrium situations. On a lattice of any dimension with any translation-invariant local Hamiltonian, ... More
Rectification of Twitching bacteria through narrow channels: A numerical simulations studyJul 12 2019Bacteria living on surfaces use different types of motility mechanism to move on the surface in search of food or to form micro-colonies. Twitching is one such form of motility employed by bacteria (e.g. Neisseria gonorrhoeae) in which the polymeric extensions ... More
Rectification of Twitching bacteria through narrow channels: A numerical simulations studyJul 12 2019Jul 15 2019Bacteria living on surfaces use different types of motility mechanisms to move on the surface in search of food or to form micro-colonies. Twitching is one such form of motility employed by bacteria (e.g. Neisseria gonorrhoeae) in which the polymeric ... More
Theorie der Electrophorese -- Het Relaxatie-EffectJul 12 2019In this thesis, a theoretical treatment of the relation between electrophoretic velocity and the potential of the double layer of colloidal particles is presented. Translators' note: The theory of electrophoresis is one of the foundational topics that ... More
Mean field stability map of hard-sphere glassesJul 11 2019The response of amorphous solids to an applied shear deformation is an important problem, both in fundamental and applied research. To tackle this problem, we focus on a system of hard spheres in infinite dimensions as a solvable model for colloidal systems ... More
Logarithmic correlation functions for critical dense polymers on the cylinderJul 11 2019We compute lattice correlation functions for the model of critical dense polymers on a semi-infinite cylinder of perimeter $n$. In the lattice loop model, contractible loops have a vanishing fugacity whereas non-contractible loops have a fugacity $\alpha\in(0,\infty)$. ... More
Heisenberg-Kitaev Models on Hyperhoneycomb and Stripyhoneycomb Lattices: 3D-2D Equivalence of Ordered States and Phase DiagramsJul 11 2019We discuss magnetically ordered states, arising in Heisenberg-Kitaev and related spin models, on three-dimensional (3D) harmonic honeycomb lattices. For large classes of ordered states, we show that they can be mapped onto two-dimensional (2D) counterparts ... More
Detecting hidden and composite orders in layered models via machine learningJul 11 2019We use machine learning to study layered spin models where composite order parameters may emerge as a consequence of the interlayerer coupling. We focus on the layered Ising and Ashkin-Teller models, determining their phase diagram via the application ... More
On The Evolution Of Operator Complexity Beyond ScramblingJul 11 2019We study operator complexity on various time scales with emphasis on those much larger than the scrambling period. We use, for systems with a large but finite number of degrees of freedom, the notion of K-complexity employed in arXiv:1812.08657 for infinite ... More
Universal behavior in non stationary Mean Field GamesJul 11 2019Mean Field Games provide a powerful framework to analyze the dynamics of a large number of controlled objects in interaction. Though these models are much simpler than the underlying differential games they describe in some limit, their behavior is still ... More
Torus Spectroscopy of the Gross-Neveu-Yukawa Quantum Field Theory: Free Dirac versus Chiral Ising Fixed PointJul 11 2019We establish the universal torus low-energy spectra at the free Dirac fixed point and at the strongly coupled {\em chiral Ising} fixed point and their subtle crossover behaviour in the Gross-Neuveu-Yukawa field theory with ${n_\text{D}=4}$ component Dirac ... More
Fixation properties of rock-paper-scissors games in fluctuating populationsJul 11 2019Jul 12 2019Rock-paper-scissors games metaphorically model cyclic dominance in ecology and microbiology. In a static environment, these models are characterized by fixation probabilities obeying two different "laws" in large and small well-mixed populations. Here, ... More
Fixation properties of rock-paper-scissors games in fluctuating populationsJul 11 2019Rock-paper-scissors games metaphorically model cyclic dominance in ecology and microbiology. In a static environment, these models are characterized by fixation probabilities obeying two different "laws" in large and small well-mixed populations. Here, ... More
Highly parallel algorithm for the Ising ground state searching problemJul 11 2019Finding an energy minimum in the Ising model is an exemplar objective, associated with many combinatorial optimization problems, that is computationally hard in general, but occurs in all areas of modern science. There are several numerical methods, providing ... More
Fast algorithm for topologically disordered lattices with constant coordination numberJul 11 2019We present a stochastic algorithm for constructing a topologically disordered (i.e., non-regular) spatial lattice with nodes of constant coordination number, the CC lattice. The construction procedure dramatically improves on an earlier proposal [Phys. ... More
Ground state of the three-dimensional BCS d-wave superconductorJul 11 2019We determine the mean-field ground state of the three-dimensional rotationally symmetric d-wave ($\ell=2$) superconductor at weak coupling. It is a non-inert state, invariant under the symmetry $C_{2}$ only, which breaks time reversal symmetry almost ... More
Hydrodynamically interrupted droplet growth in scalar active matterJul 10 2019Suspensions of spherical active particles often show microphase separation. At a continuum level, coupling their scalar density to fluid flow, there are two distinct explanations. Each involves an effective interfacial tension: the first mechanical (causing ... More
Spin-spin correlations in central rows of Ising models with holesJul 10 2019In our previous works on infinite horizontal Ising strips of width $m$ alternating with layers of strings of Ising chains of length $n$, we found the surprising result that the specific heats are not much different for different values of $N$, the separation ... More
Quantum bath statistics taggingJul 10 2019The possibility of discriminating the statistics of a thermal bath using indirect measurements performed on quantum probes is presented. The scheme relies on the fact that, when weakly coupled with the environment of interest, the transient evolution ... More
Invariants of winding-numbers and steric obstruction in dynamics of flux linesJul 10 2019We classify the sectors of configurations that result from the dynamics of 2d crossing flux lines, which are the simplest degrees of freedom of the 3-coloring lattice model. We show that the dynamical obstruction is the consequence of two effects: (i) ... More
Transmission through potential barriers with a generalised Fermi-Dirac currentJul 10 2019We study the effect of the shape of different potential barriers on the transmitted charged current whose fermionic population is not monoenergetic but is described by means of an energy spectrum. The generalised Kappa Fermi-Dirac distribution function ... More
Scalable detection of latent patterns across scales -- from nanomagnets to astrophysicsJul 10 2019Detection of patterns hidden in data is a core challenge across many disciplines. In this manuscript, we highlight two low-cost tools for the extraction of latent patterns - namely, the latent entropy and the latent dimension measures. Here the aim is ... More
Approaching the Kosterlitz-Thouless transition for the classical XY model with tensor networksJul 10 2019We apply variational tensor-network methods for simulating the Kosterlitz-Thouless phase transition in the classical two-dimensional XY model. In particular, using uniform matrix product states (MPS) with non-abelian O(2) symmetry, we compute the universal ... More
Mechanism for a Chemical Potential of Nonequilibrium Magnons in Parametric Parallel PumpingJul 10 2019We demonstrate how a magnon chemical potential is generated in parametric parallel pumping. We study how a time-periodic magnetic field of this pumping affects magnon properties of a ferrimagnet in a nonequilibrium steady state. We show that the magnon ... More
The stability phase diagram of active Brownian particlesJul 10 2019We determine the physical processes promoting and contrasting the growth of a density fluctuation in suspensions of repulsive active Brownian particles, and determine the spinodal line by balancing the associated timescales. Particle motility both promotes ... More
Approximating Free Energy and Committor Landscapes in Standard Transition Path Sampling using Virtual Interface ExchangeJul 09 2019Transition path sampling (TPS) is a powerful technique for investigating rare transitions, especially when the mechanism is unknown and one does not have access to the reaction coordinate. Straightforward application of TPS does not directly provide the ... More
Korteweg--Vlasov fluids: A new tool for modeling flows involving gas--liquid phase transitionsJul 09 2019This paper examines hydrodynamic equations for non-ideal fluids, with the van der Waals force described via Vlasov's self-consistent field. If the spatial scale of the force is much smaller than the flow's scale, the Vlasov fluid reduces to a particular ... More
Conjectures about the structure of strong- and weak-coupling expansions of a few ground-state observables in the Lieb-Liniger and Yang-Gaudin modelsJul 09 2019In this paper, we apply experimental number theory to two integrable quantum models in one dimension, the Lieb-Liniger Bose gas and the Yang-Gaudin Fermi gas with contact interactions. We identify patterns in weak- and strong-coupling series expansions ... More
Subsystem trace distance in low-lying states of conformal field theoriesJul 09 2019We report on a systematic replica approach to calculate the subsystem trace distance for a generic quantum field theory. This method has been recently introduced in [J. Zhang, P. Ruggiero, P. Calabrese, Phys. Rev. Lett. 122, 141602 (2019)], of which this ... More
Early-Time and Late-Time Quantum ChaosJul 09 2019We show the relation between the Heisenberg averaging of regularized two-points out-of-time ordered correlation function and the two-points spectral form factor in bosonic quantum mechanics. The generalization to all even-points is also discussed. We ... More
Heating rates in periodically driven strongly interacting quantum many-body systemsJul 09 2019We study heating rates in strongly interacting quantum lattice systems in the thermodynamic limit. Using a numerical linked cluster expansion, we calculate the energy as a function of the driving time and find a robust regime in which heating is exponential ... More
Affinity-dependent bound on the spectrum of stochastic matricesJul 09 2019Affinity has proven to be a useful tool for quantifying the non-equilibrium character of time continuous Markov processes since it serves as a measure for the breaking of time reversal symmetry. It has recently been conjectured that the number of coherent ... More
Universality Classes of Stabilizer Code HamiltoniansJul 09 2019Stabilizer code quantum Hamiltonians have been introduced with the intention of physically realizing a quantum memory because of their resilience to decoherence. In order to analyze their finite temperature thermodynamics, we show how to generically solve ... More
Using data-reduction techniques to analyse biomolecular trajectoriesJul 09 2019This chapter discusses the way in which dimensionality reduction algorithms such as diffusion maps and sketch-map can be used to analyze molecular dynamics trajectories. The first part discusses how these various algorithms function, as well as practical ... More
Geometry-controlled Failure Mechanisms of Amorphous Solids on the NanoscaleJul 09 2019Amorphous solids, confined on the nano-scale, exhibit a wealth of novel phenomena yet to be explored. In particular, the response of such solids to a mechanical load is not well understood and, as has been demonstrated experimentally, it differs strongly ... More
Gelation impairs small molecule migration in polymer mixturesJul 09 2019Surface segregation of the low-molecular weight component in a polymeric mixture leads to degradation of industrial formulations. We report a simultaneous phase separation and surface migration phenomena in oligomer-polymer and oligomer-gel systems following ... More
Brittle to quasibrittle transition in a compound fiber bundleJul 09 2019The brittle to quasibrittle transition has been studied for a compound of two different kinds of fibrous materials, having distinct difference in their breaking strengths under the framework of the fiber bundle model. A random fiber bundle model has been ... More
Effects of setting the temperatures in the parallel tempering Monte Carlo algorithmJul 08 2019Parallel tempering Monte Carlo has proven to be an efficient method in optimization and sampling applications. Having an optimized temperature set enhances the efficiency of the algorithm through more-frequent replica visits to the temperature limits. ... More
Chain Formation in a 2-Dimensional System of Hard Spheres with a Short Range, Anisotropic InteractionJul 08 2019We analyze a generalization of the hard sphere dipole system in two dimensions, in which the interaction range and the degree of anisotropy in the interaction can be varied. We focus on the system in the limit the interaction becomes increasingly short-ranged, ... More
Phase Diagram for a model of Spin-Crossover in Molecular CrystalsJul 08 2019Spin-crossover has a wide range of applications from memory devices to sensors. This has to do mainly with the nature of the transition, which may be abrupt, gradual or incomplete and may also present hysteresis. This transition alters the properties ... More
Continuous time random walk and diffusion with generalized fractional Poisson processJul 08 2019A non-Markovian counting process, the `generalized fractional Poisson process' (GFPP) introduced by Cahoy and Polito in 2013 is analyzed. The GFPP contains two index parameters $0<\beta\leq 1$, $\alpha >0$ and a time scale parameter. Generalizations to ... More
Separation of variables and scalar products at any rankJul 08 2019Separation of variables (SoV) is a special property of integrable models which ensures that the wavefunction has a very simple factorised form in a specially designed basis. Even though the factorisation of the wavefunction was recently established for ... More
Boundaries and unphysical fixed points in Dynamical Quantum Phase TransitionJul 08 2019Dynamical quantum phase transition (DQPT) is a periodic phase transition in large quantum systems wherein certain physical quantities show non-analyticity at a particular time $t_c$. We show by exact RG analysis of the quantum Ising model on scale invariant ... More
Structural atomistic mechanism for the glass transition entropic scenarioJul 08 2019A popular Adam--Gibbs scenario has suggested that the excess entropy of glass and liquid over crystal dominates the dynamical arrest at the glass transition with exclusive contribution from configurational entropy over vibrational entropy. However, an ... More
Survival probability of stochastic processes beyond persistence exponentsJul 08 2019For many stochastic processes, the probability $S(t)$ of not-having reached a target in unbounded space up to time $t$ follows a slow algebraic decay at long times, $S(t)\sim S_0/t^\theta$. This is typically the case of symmetric compact (i.e. recurrent) ... More
Single-boson exchange decomposition of the vertex functionJul 08 2019We present a decomposition of the two-particle vertex function of the single-band Anderson impurity model which imparts a physical interpretation of the vertex in terms of the exchange of bosons of three flavors. We evaluate the various components of ... More
Bell correlations at Ising quantum critical pointsJul 08 2019When a collection of distant observers share an entangled quantum state, the statistical correlations among their measurements may violate a many-body Bell inequality, demonstrating a non-local behavior. Focusing on the Ising model in a transverse-field ... More
Fluctuation theorem in cavity quantum electrodynamics systemsJul 08 2019We derive an integral fluctuation theorem (FT) in a general setup of cavity quantum electrodynamics systems. In the derivation, a key difficulty lies in a diverging behavior of entropy change arising from the zero-temperature limit of an external bath, ... More
Shock propagation in the hard sphere gas in two dimensions: comparison between simulations and hydrodynamicsJul 08 2019We study the radial distribution of pressure, density, temperature and flow velocity fields at different times in a two dimensional hard sphere gas that is initially at rest and disturbed by injecting kinetic energy in a localized region through large ... More
A family of closed-form solutions for two-dimensional correlated diffusion processesJul 07 2019Bounded diffusion processes are models of transport phenomena with wide applicability across many fields. These processes are described by their probability density functions (PDFs), which often obey Fokker-Planck equations (FPEs). While obtaining analytical ... More
Effects of Janus Oscillators in the Kuramoto Model with Positive and Negative CouplingsJul 07 2019We study the effects of Janus oscillators in a system of phase oscillators in which the coupling constants take both positive and negative values. Janus oscillators may also form a cluster when the other ones are ordered and we calculate numerically the ... More
Scaling in simple continued fractionJul 07 2019We consider a class of real numbers, a subset of irrational numbers and certain mathematical constants, for which the elements in the simple continued fraction appears to be random. As an illustrative example, one can consider $\pi = \{x_0, x_1, x_2, ... More
Quantum implications of non-extensive statisticsJul 06 2019Exploring the analogy between quantum mechanics and statistical mechanics we formulate an integrated version of the Quantropy functional [1]. With this prescription we compute the propagator associated to Boltzmann-Gibbs statistics in the semiclassical ... More
Morphology Formation in Binary Mixtures upon Gradual DestabilisationJul 06 2019Spontaneous liquid-liquid phase separation is commonly understood in terms of phenomenological mean-field theories. These theories correctly predict the structural features of the fluid at sufficiently long time scales and wavelengths. However, these ... More
Morphology Formation in Binary Mixtures upon Gradual DestabilisationJul 06 2019Jul 10 2019Spontaneous liquid-liquid phase separation is commonly understood in terms of phenomenological mean-field theories. These theories correctly predict the structural features of the fluid at sufficiently long time scales and wavelengths. However, these ... More
Magnetization dynamics in clean and disordered spin-1 XXZ chainsJul 05 2019We study spin transport in the one-dimensional anisotropic S = 1 Heisenberg model. Particular emphasis is given to dynamics at infinite temperature, where current autocorrelations and spatio-temporal correlation functions are obtained by means of an efficient ... More
Towards a theory of assembly of protein complexes: lessons from equilibrium statistical physicsJul 05 2019Cellular functions are established through biological evolution, but are constrained by the laws of physics. For instance, the physics of protein folding limits the lengths of cellular polypeptide chains. Consequently, many cellular functions are carried ... More
Optimal cycles for low-dissipation heat enginesJul 05 2019We consider the optimization of a finite-time Carnot engine characterized by small dissipations. We show with a simple inequality that the optimal strategy is to perform infinitesimal cycles around a given working point, which can be thus chosen optimally. ... More
A crossover in spatio-temporal correlations of strain fluctuations in glass forming liquidsJul 05 2019Via molecular dynamics simulations of a generic glass former in the liquid state, it is shown that spatial correlations of strain fluctuations exhibit a crossover from the well-established power-law $\sim 1/r^3$-decay at long wavelengths to an exponential ... More
Fermionic dualityJul 05 2019Duality transformations play a very important role in theoretical physics. In this paper I propose new duality transformations for fermionic theories. They map the strong coupling regime of one theory to the weak coupling regime of another theory. These ... More
The velocity of dynamical chaos during propagation of the positive Lyapunov exponents region under non-local conditionsJul 05 2019The dynamics of the system is investigated when one part of the system initially behaves in a regular manner and the other in a chaotic one. The propagation of the chaos is considered as the motion of a region with the maximal Lyapunov exponent greater ... More
Entropy production in Master Equations and Fokker-Planck Equations: facing the coarse-graining and recovering the information lossJul 05 2019Systems operating out of equilibrium exchange energy and matter with the environment, thus producing entropy in their surroundings. Since the entropy production depends on the current flowing throughout the system, its quantification is affected by the ... More
An operator derivation of the Feynman-Vernon theory, with applications to the generating function of bath energy changes and to anharmonic bathsJul 05 2019Jul 08 2019We present a derivation of the Feynman-Vernon approach to open quantum systems in the language of super-operators. We show that this gives a new and more direct derivation of the generating function of energy changes in a bath, or baths. This generating ... More
An operator derivation of the Feynman-Vernon theory, with applications to the generating function of bath energy changes and to anharmonic bathsJul 05 2019We present a derivation of the Feynman-Vernon approach to open quantum systems in the language of super-operators. We show that this gives a new and more direct derivation of the generating function of energy changes in a bath, or baths. This generating ... More
Random sequential adsorption on Euclidean, fractal and random latticesJul 04 2019Irreversible adsorption of objects of different shapes and sizes on Euclidean, fractal and random lattices is studied. The adsorption process is modeled by using random sequential adsorption (RSA) algorithm. Objects are adsorbed on one-, two-, and three-dimensional ... More
Efficiency fluctuations of a quantum Otto engineJul 04 2019We derive the probability distribution of the efficiency of a quantum Otto engine. We explicitly compute the quantum efficiency statistics for an analytically solvable two-level engine. We analyze the occurrence of values of the stochastic efficiency ... More
Linear response theory and Green-Kubo relations for active matterJul 04 2019We address the question of how interacting active systems in a non-equilibrium steady-state respond to an external perturbation. We establish an extended fluctuation-dissipation theorem for Active Brownian Particles (ABP) which highlights the role played ... More
Cardy states, defect lines and chiral operators of coset CFTs on the latticeJul 04 2019We construct Cardy states, defect lines and chiral operators for rational coset conformal field theories on the lattice. The bulk theory is obtained by taking the overlap between tensor network representations of different string-nets, while the primary ... More
A statistical framework for generating microstructures of two-phase random materials: application to fatigue analysisJul 04 2019Random microstructures of heterogeneous materials play a crucial role in the material macroscopic behavior and in predictions of its effective properties. A common approach to modeling random multiphase materials is to develop so-called surrogate models ... More
Hydrodynamics of Active Defects: from order to chaos to defect orderingJul 04 2019Topological defects play a prominent role in the physics of two-dimensional materials. When driven out of equilibrium in active nematics, disclinations can acquire spontaneous self-propulsion and drive self-sustained flows upon proliferation. Here we ... More
An alternative to diagrams for the critical O(N) model: dimensions and structure constants to order $1/N^2$Jul 04 2019We apply the methods of modern analytic bootstrap to the critical $O(N)$ model in a $1/N$ expansion. At infinite $N$ the model possesses higher spin symmetry which is weakly broken as we turn on $1/N$. By studying consistency conditions for the correlator ... More
Dynamical collective memory in fluidized granular materialsJul 04 2019Recent experiments with rotational diffusion of a probe in a vibrated granular media revealed a rich scenario, ranging from the dilute gas to the dense liquid with cage effects and an unexpected superdiffusive behavior at large times. Here we setup a ... More
Unconventional spin glass state in elemental neodymium in the absence of extrinsic disorderJul 04 2019Spin glasses are a fascinating but highly complex magnetic state of matter, traditionally investigated in materials with a random distribution of exchange interactions. Intricately linked to spin frustration and disorder, spin glasses exhibit no long-range ... More
Abelian and Non-Abelian Chiral Spin Liquids in a Compact Tensor Network RepresentationJul 04 2019We provide new insights into the Abelian and non-Abelian chiral Kitaev spin liquids on the star lattice using the recently proposed loop gas(LG) and string gas(SG) states[arXiv:1901.05786]. Those are compactly represented in the language of tensor network. ... More
Kardar-Parisi-Zhang Equation with temporally correlated noise: a non-perturbative renormalization group approachJul 04 2019We investigate the universal behavior of the Kardar-Parisi-Zhang equation with temporally correlated noise. The presence of time correlations in the microscopic noise breaks the statistical tilt symmetry, or Galilean invariance, of the original KPZ equation ... More
Where Nonlinearity in Thermodynamic Average Comes from? Configurational Geometry RevisitedJul 04 2019For classical discrete system under constant composition, we theoretically examine origin of nonlinearity in thermodynamic (so-called canonical) average w.r.t. many-body interactions, in terms of geometrical information in configuratin space. We clarify ... More
Theory of relaxation dynamics for anomalous diffusion processes in harmonic potentialJul 04 2019Optical tweezers setup is often used to probe the motion of individual tracer particle, which promotes the study of relaxation dynamics of a generic process confined in a harmonic potential. We uncover the dependence of ensemble- and time-averaged mean ... More
Fluctuation-induced potential for an impurity in a semi-infinite one-dimensional Bose gasJul 04 2019We consider an impurity in a semi-infinite one-dimensional system of weakly-interacting bosons. We calculate the interaction potential for the impurity due to the end of the system, i.e., the wall. For local repulsive (attractive) interaction between ... More
A Quantum Field Theory of Representation LearningJul 04 2019Continuous symmetries and their breaking play a prominent role in contemporary physics. Effective low-energy field theories around symmetry breaking states explain diverse phenomena such as superconductivity, magnetism, and the mass of nucleons. We show ... More
Scaling behavior of the stationary states arising from dissipation at continuous quantum transitionsJul 03 2019We study the critical behavior of the nonequilibrium dynamics and of the steady states emerging from the competition between coherent and dissipative dynamics close to quantum phase transitions. The latter is induced by the coupling of the system with ... More