Latest in cond-mat.stat-mech

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Spectral signatures of non-thermal baths in quantum thermalizationMar 18 2019We show that certain coherences, termed as heat-exchange coherences, which contribute to the thermalization process of a quantum probe in a repeated interactions scheme, can be extracted from the power spectrum of the probe system. We suggest to use the ... More
Energy Dissipation Bounds in Autonomous Thermodynamic SystemsMar 15 2019How much free energy is irreversibly lost when a system is moved through thermodynamic space? For systems with deterministic control, lower bounds on energy dissipation are established. Recent literature has also bounded the cost of moving a single degree ... More
Distribution of Brownian coincidencesMar 15 2019We study the probability distribution, $P_N(T)$, of the coincidence time $T$, i.e. the total local time of all pairwise coincidences of $N$ independent Brownian walkers. We consider in details two geometries: Brownian motions all starting from $0$, and ... More
Arrested dynamics of the dipolar hard-sphere modelMar 15 2019We report the combined results of molecular dynamics simulations and theoretical calculations concerning various dynamical arrest transitions in a model system representing a dipolar fluid, namely, N (softcore) rigid spheres interacting through a truncated ... More
Robust quantum many-body scars in fracton systemsMar 14 2019We study a one-dimensional translation-invariant Floquet quantum circuit model constrained to conserve a $U(1)$ charge and its dipole moment. We demonstrate that the Floquet spectrum contains quantum many-body scars, a small set of localized states in ... More
Direct evaluation of dynamical large-deviation rate functions using a variational ansatzMar 14 2019We describe a simple way to bound and compute large-deviation rate functions for time-extensive dynamical observables in continuous-time Markov chains. We start with a model, defined by a set of rates, and a time-extensive dynamical observable. We construct ... More
Critical points of the three-dimensional Bose-Hubbard model from on-site atom number fluctuationsMar 14 2019We discuss how positions of critical points of the three-dimensional Bose-Hubbard model can be accurately obtained from variance of the on-site atom number operator, which can be measured through atom-number-projection spectroscopy. The idea that we explore ... More
Running Measurement Protocol for the Quantum First-detection problemMar 14 2019The problem of the detection statistics of a quantum walker has received increasing interest, connected as it is to the problem of quantum search. We investigate the effect of employing a moving detector, using a projective measurement approach with fixed ... More
Maxwell's demons with finite size and response timeMar 13 2019A Maxwell's demon selectively opens a gate between two chambers depending on the qualities of an approaching molecule, thereby seemingly violating the second law of thermodynamics. Many detailed analyses of this thought experiment have been put forth, ... More
$XY$ model with antinematic interactionMar 13 2019We consider the $XY$ model with ferromagnetic (FM) and antinematic (AN) nearest-neighbor interactions on a square lattice for a varying interaction strength ratio. Besides the expected FM and AN quasi-long-range order (QLRO) phases we identify at low ... More
Span observables - "When is a foraging rabbit no longer hungry?"Mar 13 2019Be $X_t$ a random walk. We study its span $S$, i.e. the size of the domain visited up to time $t$. We want to know the probability that $S$ reaches $1$ for the first time, as well as the density of the span given $t$. Analytical results are presented, ... More
Dynamics of dissipative topological defects in coupled phase oscillatorsMar 13 2019The dynamics of dissipative topological defects in a system of coupled phase oscillators, arranged in one and two-dimensional arrays, is numerically investigated using the Kuramoto model. After an initial rapid decay of the number of topological defects, ... More
Entanglement transition from variable-strength weak measurementsMar 13 2019We show that weak measurements can induce a quantum phase transition of interacting many-body systems from an ergodic thermal phase with a large entropy to a nonergodic localized phase with a small entropy, but only if the measurement strength exceeds ... More
On the Perturbation of Self-Organized Urban Street NetworksMar 13 2019We investigate urban street networks as a whole within the frameworks of information physics and statistical physics. Urban street networks are envisaged as evolving social systems subject to a Boltzmann-mesoscopic entropy conservation. For self-organized ... More
Quantum kinetic perturbation theory for near-integrable spin chains with weak long-range interactionsMar 13 2019For a transverse-field Ising chain with weak long-range interactions we develop a perturbative scheme, based on quantum kinetic equations, around the integrable nearest-neighbour model. We introduce, discuss, and benchmark several truncations of the time ... More
Charged and neutral fixed points in the O(N)+O(N)-model with Abelian gauge fieldsMar 13 2019In the Abelian-Higgs model, or Ginzburg-Landau model of superconductivity, the existence of an infrared stable charged fixed point ensures that there is a parameter range where the superconducting phase transition is second order, as opposed to fluctuation-induced ... More
Stochastic Thermodynamics with Odd Controlling ParametersMar 13 2019Stochastic thermodynamics extends the notions and relations of classical thermodynamics to small systems with strong fluctuations. The definition of work and heat and the microscopically reversible condition are two key concepts in the current framework ... More
From random matrix theory to linear-in-T specific heat in glassesMar 12 2019The low-temperature properties of glasses present important differences with respect to crystalline matter. In particular, models such as the Debye model of solids, which assume the existence of an underlying regular lattice, predict that the specific ... More
A Renormalization-Group Study of Interacting Bose-Einstein condensates: Absence of the Bogoliubov Mode below Four ($T>0$) and Three ($T=0$) DimensionsMar 12 2019We derive exact renormalization-group equations for the $n$-point vertices ($n=0,1,2,\cdots$) of interacting single-component Bose-Einstein condensates based on the vertex expansion of the effective action. They have a notable feature of automatically ... More
Proximity effect and self-consistent field in a normal metal-superconductor structureMar 12 2019The concept of a self-consistent field in the theory of superconductivity based on the diagram method of the time-dependent perturbation theory is presented. It is shown that the well-known Bardeen-Cooper-Schrieffer equation for the order parameter of ... More
Time-convolutionless master equation: Perturbative expansions to arbitrary order and application to quantum dotsMar 12 2019The time-convolutionless quantum master equation is an exact description of the nonequilibrium dynamics of open quantum systems, with the advantage of being local in time. We derive a perturbative expansion to arbitrary order in the system-reservoir coupling ... More
Quantum error correction and entanglement phase transition in random unitary circuits with projective measurementsMar 12 2019We analyze the dynamics of entanglement entropy in a generic quantum many-body open system from the perspective of quantum information and error corrections. We introduce a random unitary circuit model with intermittent projective measurements, in which ... More
Many-body dynamics in long-range hopping model in the presence of correlated and uncorrelated disorderMar 12 2019We investigate the many-body dynamics of entanglement entropy (EE) and participation ratio (PR) considering a one-dimensional non-interacting long-range power-law hopping model with un-correlated (referred as model I) and correlated (referred as model ... More
On the scaling behaviour of the alternating spin chainMar 12 2019In this note we report the results of our study of a 1D integrable spin chain whose critical behaviour is governed by a CFT possessing a continuous spectrum of scaling dimensions. It is argued that the computation of the density of Bethe states of the ... More
Partial Isometries, Duality, and Determinantal Point ProcessesMar 12 2019A determinantal point process (DPP) is an ensemble of random nonnegative-integer-valued Radon measures $\Xi$ on a space $S$ with measure $\lambda$, whose correlation functions are all given by determinants specified by an integral kernel $K$ called the ... More
Self-consistent theory of many-body localisation in a quantum spin chain with long-range interactionsMar 12 2019Many-body localisation is studied in a disordered quantum spin-1/2 chain with long-ranged power-law interactions, and distinct power-law exponents for interactions between longitudinal and transverse spin components. Using a self-consistent mean-field ... More
How to probe the microscopic onset of irreversibility with ultracold atomsMar 12 2019Mar 13 2019The microscopic onset of irreversibility is finally becoming an experimental subject. Recent experiments on microscopic open and even isolated systems have measured statistical properties associated with entropy production, and hysteresis-like phenomena ... More
How to probe the microscopic onset of irreversibility with ultracold atomsMar 12 2019The microscopic onset of irreversibility is finally becoming an experimental subject. Recent experiments on microscopic open and even isolated systems have measured statistical properties associated with entropy production, and hysteresis-like phenomena ... More
Time-averaged MSD for switching diffusionMar 12 2019We consider a classic two-state switching diffusion model from a single-particle tracking perspective. The mean and the variance of the time-averaged mean square displacement (TAMSD) are computed exactly. When the measurement time (i.e., the trajectory ... More
Exact calculations of first-passage properties on the pseudofractal scale-free webMar 12 2019In this paper, we consider discrete time random walks on the pseudofractal scale-free web (PSFW) and we study analytically the related first passage properties. First, we classify the nodes of the PSFW into different levels and propose a method to derive ... More
Generation of ice states through deep reinforcement learningMar 12 2019We present a deep reinforcement learning framework where a machine agent is trained to search for a policy to generate a ground state for the square ice model by exploring the physical environment. After training, the agent is capable of proposing a sequence ... More
Accelerated estimation of long-timescale kinetics by combining weighted ensemble simulation with Markov model "microstates" using non-Markovian theoryMar 12 2019The weighted ensemble (WE) simulation strategy can provide unbiased sampling of non-equilibrium processes, such as molecular folding or binding. Once converged to steady state, exact kinetics can be extracted from any discrete clustering of the configuration ... More
The Magnetic Grüneisen Parameter for Model SystemsMar 11 2019The magneto-caloric effect (MCE), which is the refrigeration based on the variation of the magnetic entropy, is of great interest in both technological applications and fundamental research. The MCE is quantified by the magnetic Gr\"uneisen parameter ... More
Spontaneous freezing in driven-dissipative quantum systemsMar 11 2019Attaining a deeper knowledge of critical non-equilibrium phenomena is a standing challenge in the fields of open quantum systems and many-body physics. For instance, a comprehensive understanding of how different dissipative phases coexist in multistable ... More
The many avatars of Curzon-Ahlborn efficiencyMar 11 2019Efficiency at maximum power output of irreversible heat engines has attracted a lot of interest in recent years. We discuss the occurance of a particularly simple and elegant formula for this efficiency in various different models. The so-called Curzon-Ahlborn ... More
Five approaches to exact open-system dynamics: Complete positivity, divisibility and time-dependent observablesMar 11 2019To extend the classical concept of Markovianity to an open quantum system, different notions of the divisibility of its dynamics have been introduced. Here we analyze this issue by five complementary approaches: equations of motion, real-time diagrammatics, ... More
Critical hysteresis on dilute triangular lattice revisitedMar 11 2019Critical hysteresis in the zero-temperature random-field Ising model on a dilute triangular lattice was studied in Phys Rev E 91, 012131 (2015). The occupation probability $c$ of a sublattice was decreased to transform a triangular lattice ($c=1$) to ... More
Squeezed ensembles for systems with first-order phase transitionsMar 11 2019All ensembles of statistical mechanics are equivalent in the sense that they give the equivalent thermodynamic functions in the thermodynamics limit. However, when investigating microscopic structures in the first-order phase transition region, one must ... More
Asymptotically faster algorithm for counting self-avoiding walks and self-avoiding polygonsMar 10 2019We give an algorithm for counting self-avoiding walks or self-avoiding polygons that runs in time $\exp(C\sqrt{n\log n})$ on 2-dimensional lattices and time $\exp(C_dn^{(d-1)/d}\log n)$ on $d$-dimensional lattices for $d>2$.
The Local Density Approximation in Density Functional TheoryMar 10 2019We give the first mathematically rigorous justification of the Local Density Approximation in Density Functional Theory. We provide a quantitative estimate on the difference between the grand-canonical Levy-Lieb energy of a given density (the lowest possible ... More
Exact solution for the order parameter profiles and the Casimir force in $^4$He superfluid films in an effective field theoryMar 10 2019We present an analytical solution of an effective field theory which, in one of its formulations, is equivalent to the Ginzburg's $\Psi$-theory for the behavior of the Casimir force in a film of $^4$He in equilibrium with its vapor near the superfluid ... More
Mortal Brownian motion: three short storiesMar 10 2019Mortality introduces an intrinsic time scale into the scale-invariant Brownian motion. This fact has important consequences for different statistics of Brownian motion. Here we are telling three short stories, where spontaneous death, such as radioactive ... More
Basin entropy behavior in a cyclic model of the rock-paper-scissors typeMar 09 2019We deal with stochastic network simulations in a model with three distinct species that compete under cyclic rules which are similar to the rules of the popular rock-paper-scissors game. We investigate the Hamming distance density and then the basin entropy ... More
Variation of elastic energy shows reliable signal of upcoming catastrophic failureMar 09 2019We consider the Equal-Load-Sharing Fiber Bundle Model as a model for composite materials under stress and derive elastic energy and damage energy as a function of strain. With gradual increase of stress (or strain) the bundle approaches a catastrophic ... More
Spin-wave thermodynamics of square-lattice antiferromagnets revisitedMar 09 2019Modifying the conventional spin-wave theory in a novel manner based on the Wick decomposition, we present an elaborate thermodynamics of square-lattice quantum antiferromagnets. Our scheme is no longer accompanied by the notorious problem of an artificial ... More
Thermal dissipation in two dimensional relativistic Fermi gases with a relaxation time modelMar 09 2019The thermal transport properties of a two dimensional Fermi gas are explored, for the full range of temperatures and densities. The heat flux is established by solving the Uehling-Uhlebeck equation using a relaxation approximation given by Marle's collisional ... More
Scaling laws for diffusion on (trans)fractal scale-free networksMar 08 2019Fractal (or transfractal) features are common in real-life networks and are known to influence the dynamic processes taking place in the network itself. Here we consider a class of scale-free deterministic networks, called $(u,v)$-flowers, whose topological ... More
Exact results for the first-passage properties in a class of fractal networksMar 08 2019In this work we consider a class of recursively-grown fractal networks $G_n(t)$, whose topology is controlled by two integer parameters $t$ and $n$. We first analyse the structural properties of $G_n(t)$ (including fractal dimension, modularity and clustering ... More
Gauge Theory and Boundary IntegrabilityMar 08 2019We study the mixed topological / holomorphic Chern-Simons theory of Costello, Witten and Yamazaki on an orbifold $(\Sigma\times{\mathbb C})/{\mathbb Z}_2$, obtaining a description of lattice integrable systems in the presence of a boundary. By performing ... More
Quantum valence bond ice theory for proton-driven quantum spin-dipole liquidsMar 08 2019We present a theory of a hybrid quantum liquid state, $\textit{quantum spin-dipole liquid}$ (QSDL), in a hydrogen-bonded electron system, by combining a quantum proton ice and Anderson's resonating valence bond spin liquid, motivated by the recent experimental ... More
Generalized Eigenstate Thermalization in 2d CFTsMar 08 2019Infinite-dimensional conformal symmetry in two dimensions leads to integrability of 2d conformal field theories through an infinite tower of local conserved qKdV charges in involution. We discuss the role this integrable structure plays in equilibration ... More
Unsupervised identification of the phase transition on the 2D-Ising modelMar 08 2019We investigate deep learning autoencoders for the unsupervised recognition of phase transitions in physical systems formulated on a lattice. We use spin configurations produced for the 2-dimensional ferromagnetic Ising model in zero external magnetic ... More
Dynamical phase transition in the 1D-transverse field Ising chain characterized by the transverse magnetization spectral functionMar 08 2019We study a 1D-Quantum Ising Model in transverse field driven out of equilibrium by performing a composite quantum quench to deduce the asymptotic properties of the transverse magnetization stationary state via the analysis of the spectral function. What ... More
A general framework to study the extremal phase transition of black holesMar 08 2019We investigate the universality of some features for the extremal phase transition of black holes and unify all the approaches which have been applied in different spacetimes. Unlike the other existing approaches where the information of the spacetime ... More
Large fluctuations of the first detected quantum return timeMar 08 2019Mar 11 2019How long does it take a quantum particle to return to its origin? Under repeated projective measurements aimed to detect the return, the closed cycle yields a geometrical phase which shows that the average first detected return time is equal to the winding ... More
Large fluctuations of the first detected quantum return timeMar 08 2019How long does it take a quantum particle to return to its origin? Under repeated projective measurements aimed to detect the return, the closed cycle yields a geometrical phase which shows that the average first detected return time is equal to the winding ... More
Phase transitions in solvent dependent polymer adsorption in three dimensionsMar 08 2019We consider the phase diagram of self-avoiding walks (SAW) on the simple cubic lattice subject to surface and bulk interactions, modeling an adsorbing surface and variable solvent quality for a polymer in dilute solution, respectively. We simulate SAWs ... More
Characterization of the non-Arrhenius behavior of supercooled liquids by modeling non-additive stochastic systemsMar 07 2019The characterization of the formation mechanisms of amorphous solids is a large avenue for research since the understanding of its non-Arrhenius behavior becomes an actual challenge to overcome. In this context, we present one path toward modeling the ... More
Generalized hydrodynamics, quasiparticle diffusion, and anomalous local relaxation in random integrable spin chainsMar 07 2019We study the nonequilibrium dynamics of random spin chains that remain integrable (i.e., solvable via Bethe ansatz): because of correlations in the disorder, these systems escape localization and feature ballistically spreading quasiparticles. We derive ... More
Dynamical quantum phase transitions in many-body localized systemsMar 07 2019We investigate dynamical quantum phase transitions in disordered quantum many-body models that can support many-body localized phases. Employing $l$-bits formalism, we lay out the conditions for which singularities indicative of the transitions appear ... More
Transient magnetic domain wall AC dynamics by means of MOKE microscopyMar 07 2019The domain wall response under constant external magnetic fields reveals a complex behavior where sample disorder plays a key role. Furthermore, the response to alternating magnetic fields has only been explored in limited cases and analyzed in terms ... More
The stochastic motion of self-thermophoretic Janus particlesMar 07 2019Langevin equations for the self-thermophoretic dynamics of Janus motors partially coated with an absorbing layer that is heated by a radiation field are presented. The derivation of these equations is based on fluctuating hydrodynamics and radiative heat ... More
Universal voter model emergence in genetically labeled homeostatic tissuesMar 07 2019Recent experiments in adult mammalian tissues have found scaling relations of the voter model in the dynamics of the genetically labeled population of stem cells. Yet, the reason for this seemingly robust appearance of the voter model remains unexplained. ... More
Quantum Martingale Theory and Entropy ProductionMar 07 2019We develop a martingale theory to describe fluctuations of entropy production for open quantum systems in nonequilbrium steady states. Using the formalism of quantum jump trajectories, we identify a decomposition of entropy production into an exponential ... More
Liquid-Gas phase transition in nucleiMar 07 2019This review article takes stock of the progress made in understanding the phase transition in hot nuclei and highlights the coherence of observed signatures
Machine learning method for single trajectory characterizationMar 07 2019In order to study transport in complex environments, it is extremely important to determine the physical mechanism underlying diffusion, and precisely characterize its nature and parameters. Often, this task is strongly impacted by data consisting of ... More
The effect of short-range interaction and correlations on the charge and electric field distribution in a model solid electrolyteMar 07 2019Mar 13 2019A simple lattice model of a solid electrolyte presented as a xy-slab geometry system of mobile cations on a background of energetic landscape of the host system and a compensating field of uniformly distributed anions is studied. The system is confined ... More
The effect of short-range interaction and correlations on the charge and electric field distribution in a model solid electrolyteMar 07 2019A simple lattice model of a solid electrolyte presented as a xy-slab geometry system of mobile cations on a background of energetic landscape of the host system and a compensating field of uniformly distributed anions is studied. The system is confined ... More
Energy extraction of a chaotic system in a cyclic process: a Szilárd Engine perspectiveMar 07 2019Inspired by the available examples of Microcanonical Szil\'ard Engines and by the original Szil\'ard Engine, we devise a system with two degrees of freedom whose ensemble average energy, starting with a microcanical ensemble, decreases after a cyclic ... More
Langevin thermostat for robust configurational and kinetic samplingMar 07 2019We reformulate the algorithm of Gr{\o}nbech-Jensen and Farago (GJF) for Langevin dynamics simulations at constant temperature. The GJF algorithm has become increasingly popular in molecular dynamics simulations because it provides robust (i.e., insensitive ... More
Diffusion limit for a kinetic equation with a thermostatted interfaceMar 06 2019We consider a linear phonon Boltzmann equation with a reflecting/transmitting/absorbing interface. This equation appears as the Boltzmann-Grad limit for the energy density function of a harmonic chain of oscillators with inter-particle stochastic scattering ... More
Non-equilibrium fixed points of coupled Ising modelsMar 06 2019Driven-dissipative systems can exhibit non-equilibrium phenomena that are absent in their equilibrium counterparts. However, phase transitions present in these systems generically exhibit an effectively classical equilibrium behavior in spite of their ... More
Quantitative Measure of Memory Loss in Complex Spatio-Temporal SystemsMar 06 2019To make progress in understanding the issue of memory loss and history dependence in evolving complex systems, we consider the mixing rate that specifies how fast the future states become independent of the initial condition. We propose a simple measure ... More
Fokker-Planck equations for time-delayed systems via Markovian EmbeddingMar 06 2019For stochastic systems with discrete time delay, the Fokker-Planck equation (FPE) of the one-time probability density function (PDF) does not provide a complete, self-contained probabilistic description, as it explicitly involves the two-time PDF. We ... More
Producing suprathermal tails in the stationary velocity distributionMar 06 2019We revisit effective scenarios for the origin of heavy tails in stationary velocity distributions. A first analysis combines localization with diffusive acceleration. That gets realized in space plasmas to find the so-called kappa-distributions having ... More
Action principle and weak invariantsMar 06 2019A weak invariant associated with a master equation is characterized in such a way that its spectrum is not constant in time but its expectation value remains constant under time evolution generated by the master equation. Here, an intriguing relationship ... More
Relaxation times and ergodicity properties in a realistic ionic--crystal model, and the modern form of the FPU problemMar 06 2019It is well known that Gibbs' statistical mechanics is not justified for systems presenting long-range interactions, such as plasmas or galaxies. In a previous work we considered a realistic FPU-like model of an ionic crystal (and thus with long-range ... More
The Boltzmann Distribution is the Only Distribution That Gibbs-Shannon Entropy is the Thermodynamic EntropyMar 06 2019It is well know that the Boltzmann distribution can be derived from the maximum entropy principle. In this paper, we demonstrate that we don't actually need to "maximize" the entropy, requiring the thermodynamic entropy to equal to Gibbs-Shannon entropy ... More
Optimal random deposition of interacting particlesMar 05 2019Irreversible random sequential deposition of interacting particles is widely used to model aggregation phenomena in physical, chemical, and biophysical systems. We show that in one dimension the exact time dependent solution of such processes can be found ... More
Consensus ranking for multi-objective interventions in multiplex networksMar 05 2019High-centrality nodes have disproportionate influence on the behavior of a network; therefore controlling such nodes can efficiently steer the system to a desired state. Existing multiplex centrality measures typically rank nodes assuming the layers are ... More
Scaling of decoherence and energy flow in interacting quantum spin systemsMar 05 2019We address the quantum dynamics of a system composed of a qubit globally coupled to a many-body system characterized by short-range interactions. We employ a dynamic finite-size scaling framework to investigate the out-of-equilibrium dynamics arising ... More
Renormalization-group study of the many-body localization transition in one dimensionMar 05 2019Using a new approximate strong-randomness renormalization group (RG), we study the many-body localized (MBL) phase and phase transition in one-dimensional quantum systems with short-range interactions and quenched disorder. Our RG is built on those of ... More
Thermodynamic uncertainty for run-and-tumble type processesMar 05 2019Thermodynamic uncertainty relations have emerged as universal bounds on current fluctuations in non-equilibrium systems. Here we derive a new bound for a particular class of run-and-tumble type processes using the mathematical framework of renewal-reward ... More
Examples of symmetry-preserving truncations in tensor field theoryMar 05 2019We consider the tensor formulation of the non-linear O(2) sigma model and its gauged version (the compact Abelian Higgs model), on a $D$-dimensional cubic lattice, and show that tensorial truncations are compatible with the general identities derived ... More
Modulated structures in a Lebwohl-Lasher model with chiral interactionsMar 05 2019We consider a Lebwohl-Lasher lattice model with nematic directors restricted to point along $p$ planar directions. This $XY$ Lebwohl-Lasher system is the nematic analogue of the standard $p$-state clock model. We then include chiral interactions, and ... More
Solvable Models of Supercooled Liquids at the Avoided Mode-Coupling-Theory TransitionMar 05 2019Mode-Couling Theory (MCT) provides an accurate quantitative description of many supercooled liquids models in the early stages of dynamical slowing down. In realistic non-mean-field models the description become incorrect close to the MCT singularity ... More
Magnetocaloric properties of frustrated tetrahedra-based spin nanoclustersMar 05 2019Magnetization, entropy and magnetocaloric properties of various geometrically frustrated tetrahedra-based Ising antiferromagnetic nanoclusters with corner-, edge-, and face-sharing topologies are studied by exact enumeration. It is found that the studied ... More
Coarse-graining strategy for reducing multidispersity at fixed particle density: A dynamical studyMar 05 2019We present a coarse-graining method aiming to reduce multidispersity in complex fluids using the example of the well-established bidisperse Lennard-Jones mixture discovered by Kob and Andersen. Our method foots on the iterative Boltzmann inversion scheme ... More
The global benefit of randomness in individual routing on transportation networksMar 05 2019By introducing a simple model based on two-dimensional cellular automata, we reveal the relationship between the routing strategies of individual vehicles and the global behavior of transportation networks. Specifically, we characterize the routing strategies ... More
Newman-Ziff algorithm for the bootstrap percolation: application to the Archimedean latticesMar 05 2019We propose very efficient algorithms for the bootstrap percolation and the diffusion percolation models by extending the Newman-Ziff algorithm of the classical percolation [M. E. J. Newman and R. M. Ziff, Phys. Rev. Lett. 85 (2000) 4104]. Using these ... More
Using matrix product states to study the dynamical large deviations of kinetically constrained modelsMar 04 2019Here we demonstrate that tensor network techniques - originally devised for the analysis of quantum many-body problems - are well suited for the detailed study of rare event statistics in kinetically constrained models (KCMs). As concrete examples we ... More
Mesoscopic description of the adiabatic piston: kinetic equations and $\mathcal H$-theoremMar 04 2019The adiabatic piston problem is solved at the mesoscale using a Kinetic Theory approach. The problem is to determine the evolution towards equilibrium of two gases separated by a wall with only one degree of freedom (the adiabatic piston). A closed system ... More
Scaling behavior of Ising systems at first-order transitionsMar 04 2019We investigate how the scaling behavior of finite systems at magnetic first-order transitions (FOTs) with relaxational dynamics changes in correspondence of various boundary conditions. As a theoretical laboratory we consider the two-dimensional Ising ... More
Quantum many-body dynamics on the star graphMar 04 2019We study 2-local Hamiltonian quantum systems, consisting of qubits interacting on the star graph of N vertices. We numerically demonstrate that these models are generically non-integrable at infinite temperature, and find evidence for a finite temperature ... More
Memories from the ergodic phase: the awkward dynamics of spherical mixed p-spin modelsMar 04 2019We revisit the long-time limit of the out of equilibrium dynamics of mean-field spherical mixed p-spin models. We consider quenches (gradient descent dynamics) starting from initial conditions thermalized at some temperature in the ergodic phase. We perform ... More
Quantum Joule Expansion of One-Dimensional SystemsMar 04 2019We investigate the Joule expansion of nonintegrable quantum systems that contain bosons or fermions in one-dimensional lattices. A barrier initially confines the particles to be in half of the system in a thermal state described by the canonical ensemble. ... More
Kardar-Parisi-Zhang physics in the quantum Heisenberg magnetMar 04 2019Equilibrium spatio-temporal correlation functions are central to understanding weak nonequilibrium physics. In certain local one-dimensional classical systems with three conservation laws they show universal features. Namely, fluctuations around ballistically ... More
Typicality of PrethermalizationMar 04 2019Prethermalization refers to the remarkable relaxation behavior which an integrable many-body system in the presence of a weak integrability-breaking perturbation may exhibit: After initial transients have died out, it stays for a long time close to some ... More
Generalised Diffusion and Wave Equations: Recent AdvancesMar 04 2019We present a short overview of the recent results in the theory of diffusion and wave equations with generalised derivative operators. We give generic examples of such generalised diffusion and wave equations, which include time-fractional, distributed ... More
Continuous ground-state degeneracy of classical dipoles on regular latticesMar 04 2019Dipolar interactions are crucial in the modeling of many complex magnetic systems, such as the pyrochlores and artificial spin systems. Remarkably, many classical dipolar coupled spin systems exhibit a continuous ground-state degeneracy, which is unexpected ... More