Latest in cond-mat.stat-mech

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Diffusion-controlled coalescence, fragmentation and collapse of $d$-dimensional $A$-particle islands in the $B$-particle seaSep 18 2019We present a systematic analysis of diffusion-controlled evolution and collapse of two identical spatially separated $d$-dimensional $A$-particle islands in the $B$-particle sea at propagation of the sharp reaction front $A+B\to 0$ at equal species diffusivities. ... More
Work fluctuations and Jarzynski equality in stochastic resettingSep 18 2019We consider the paradigm of an overdamped Brownian particle in a potential well, which is modulated through an external protocol, in the presence of stochastic resetting. Thus, in addition to the short range diffusive motion, the particle also experiences ... More
Measures of distinguishability between stochastic processesSep 18 2019Quantifying how distinguishable two stochastic processes are lies at the heart of many fields, such as machine learning and quantitative finance. While several measures have been proposed for this task, none have universal applicability and ease of use. ... More
Nonquenched rotators ease flocking and memorise itSep 18 2019We introduce a minimal model for a two-dimensional polar flock with nonquenched rotators, and show that the rotators make the usual macroscopic order of the flock more robust than the clean system. The rotators memorise the flock-information which helps ... More
A Kinetically Constrained Model with a Thermodynamic FlavorSep 18 2019Kinetically constrained models (KCM) generically have trivial thermodynamics and yet manifest rich glassy dynamics. In order to resolve the thermodynamics-dynamics disconnect in KCMs, we derive a KCM by coarse-graining a non-trivial thermodynamic model ... More
Symmetry and its breaking in path integral approach to quantum Brownian motionSep 18 2019We study the Caldeira-Leggett model where a quantum Brownian particle interacts with an environment or a bath consisting of a collection of harmonic oscillators in the path integral formalism. Compared to the contours that the paths take in the conventional ... More
Diffusion-controlled formation and collapse of a d-dimensional A-particle island in the B-particle seaSep 17 2019We consider diffusion-controlled evolution of a $d$-dimensional $A$-particle island in the $B$-particle sea at propagation of the sharp reaction front $A+B\to 0$ at equal species diffusivities. The $A$-particle island is formed by a localized (point)$A$-source ... More
Probability based enhanced samplingSep 17 2019Many physical and chemical processes of interest take place on timescales that cannot be explored using standard molecular dynamics simulations. This renders the use of enhanced sampling mandatory. Here we introduce an enhanced sampling method that is ... More
Images of a first order spin-reorientation phase transition in a metallic kagome ferromagnetSep 17 2019First order phase transitions, where one phase replaces another by virtue of a simple crossing of free energies, are best known between solids, liquids and vapours, but they also occur in a wide range of other contexts, including even elemental magnets. ... More
Probability distribution of the boundary local time of reflected Brownian motion in Euclidean domainsSep 17 2019How long does a diffusing molecule spend in a close vicinity of a confining boundary or a catalytic surface? This quantity known as the boundary local time plays the crucial role in the description of various surface-mediated phenomena such as heterogeneous ... More
Dynamics of a periodic $XY$ chain coupled to a photon modeSep 17 2019We study the real-time dynamics of a periodic $XY$ system exposed to a composite field comprised of a constant homogeneous magnetic and a quantized circularly polarized electromagnetic fields. The interaction between the quantized mode and spin-magnetic ... More
Agent-Based Simulation of the Two-Dimensional Patlak-Keller-Segel ModelSep 17 2019The Patlak-Keller-Segel equation describes the chemotactic interactions of small organisms in the continuum limit, and a singular peak appears through spontaneous aggregation when the total mass of the organisms exceeds a critical value. To deal with ... More
Violation of the Equipartition Theorem in Confined, Laser Cooled AtomsSep 17 2019We observe a violation of the generalized equipartition theorem, one of the pivotal results of classical statistical mechanics, in a system of confined, laser cooled atoms. We quantify this violation, measure its dynamics and show that its steady state ... More
Understanding the crystallographic phase relations in alkali-trihalogeno-germanate perovskites in terms of ferroelectric or antiferroelectric arrangements of the tetrahedral GeX$_3$ unitsSep 16 2019The alkali-trihalogeno-germanates AGeX$_3$ with A a large single positive ion such as Rb, Cs, or organic radicals such as methyl ammonium (MA), and X a halogen (I, Br, Cl, F) along with the corresponding stannates (ASnX$_3$) and plumbates (APbX$_3$) exhibit ... More
The exact solution of a generalized two-spins modelSep 16 2019We present the exact solution of a family of two-spins models. The models are solved by the algebraic Bethe ansatz method using the $gl(2)$-invariant $R$-matrix and a multi-spins Lax operator. The interactions are by the Heisenberg spins exchange. We ... More
Operator Entanglement in Local Quantum Circuits II: Solitons in Chains of QubitsSep 16 2019We provide exact results for the dynamics of local-operator entanglement in quantum circuits with two-dimensional wires featuring solitons, i.e. local operators which, up to a phase, are simply shifted by the time evolution. We classify all circuits allowing ... More
Operator Entanglement in Local Quantum Circuits I: Maximally Chaotic Dual-Unitary CircuitsSep 16 2019The entanglement in operator space is a well established measure for the complexity of the quantum many-body dynamics. In particular, that of local operators has recently been proposed as dynamical chaos indicator, i.e. as a quantity able to discriminate ... More
Thermodynamic resources in continuous-variable quantum systemsSep 16 2019A system's deviation from its ambient temperature has long been known to be a resource---a consequence of the second law of thermodynamics, which constrains all systems to drift towards thermal equilibrium. Here we consider how such constraints generalize ... More
Entanglement front generated by an impurity travelling in an isolated many-body quantum systemSep 16 2019We investigate the effect on the entanglement dynamics of an impurity moving at constant velocity in a closed quantum system. We focus on one-dimensional strongly-correlated lattice models, both in the presence of integrable and chaotic dynamics. In the ... More
Advantages of $q$-logarithm representation over $q$-exponential representation from the sense of scale and shift on nonlinear systemsSep 16 2019Addition and subtraction of observed values can be computed under the obvious and implicit assumption that the scale unit of measurement should have the same for all arguments, which is valid even for any nonlinear systems. This paper starts from the ... More
Operator content of entanglement spectra after global quenches in the transverse field Ising chainSep 16 2019We consider the time evolution of the gaps of the entanglement spectrum for a block of consecutive sites in finite transverse field Ising chains after sudden quenches of the magnetic field. We provide numerical evidence that, whenever we quench at or ... More
Subdiffusion in one-dimensional Hamiltonian chains with sparse interactionsSep 16 2019We establish rigorously that transport is slower than diffusive for a class of disordered one-dimensional Hamiltonian chains. This is done by deriving quantitative bounds on the variance in equilibrium of the energy or particle current, as a function ... More
A simple statistical-mechanical interpretation of Onsager reciprocal relations and Derjaguin theory of thermo-osmosisSep 16 2019The application of a temperature gradient along a fluid-solid interface generates stresses in the fluid causing "thermo-osmotic" flow. Much of the understanding of this phenomenon is based on Derjaguin's work relating thermo-osmotic flows to the mechano-caloric ... More
The Hitchhiker model for Laplace diffusion processes in the cell environmentSep 16 2019Aggregation and fragmentation of single molecules in the cell environment lead to a spectrum of diffusivities and to statistical laws of movement very different from typical Brownian motion. Current models of intracellular transport do not explain at ... More
A toy model for anomalous transport and Griffiths effects near the Many-Body Localization transitionSep 16 2019We introduce and study a toy model for anomalous transport and Griffiths effects in one dimensional quantum disordered isolated systems near the Many-Body Localization (MBL) transitions. The model is constituted by a collection of 1d tight-binding chains ... More
Eigenstate thermalization and ensemble equivalence in few-body fermionic systemsSep 16 2019We investigate eigenstate thermalization from the point of view of vanishing particle and heat currents between a few-body fermionic Hamiltonian prepared in one of its eigenstates and an external, weakly coupled Fermi-Dirac gas. The latter acts as a thermometric ... More
Circular Cumulant Reductions for Macroscopic Dynamics of Kuramoto Ensemble with Multiplicative Intrinsic NoiseSep 16 2019We demonstrate the application of the circular cumulant approach for thermodynamically large populations of phase elements, where the Ott-Antonsen properties are violated by a multiplicative intrinsic noise. The infinite cumulant equation chain is derived ... More
Lattice Boltzmann model for weakly compressible flowsSep 15 2019We present an energy conserving lattice Boltzmann model based on a crystallographic lattice for simulation of weakly compressible flows. The theoretical requirements and the methodology to construct such a model are discussed. We demonstrate that the ... More
Choline chloride as a nano-crowder protects HP-36 from urea-induced denaturation: Insights from Solvent Dynamics and Protein-Solvent interactionSep 15 2019Urea at sufficiently high concentration unfolds the secondary structure of proteins leading to denaturation. In contrast, Choline Chloride (ChCl) and urea, in 1:2 molar ratio form a deep eutectic mixture, a liquid at room temperature and protect proteins ... More
BCS model on Quasiperiodic LatticesSep 14 2019We study the Biswas-Chatterjee-Sen (BCS) model, also known as the KCOD (Kinetic Continuous Opinion Dynamics) model on quasiperiodic lattices by using Kinetic Monte Carlo simulations and Finite Size Scaling technique. Our results are consistent with a ... More
Balancing Error and Dissipation in Highly-Reliable ComputingSep 14 2019Modern digital electronics support remarkably reliable computing, especially given the challenge of controlling nanoscale logical components that interact in fluctuating environments. However, the high-reliability limit is subject to a fundamental error-energy-efficiency ... More
A simplified Parisi AnsatzSep 14 2019We investigate how product measures behave when used as a trial distributions for the free energy functional of the Sherrington-Kirckpatrick model that is obtained from the Cavity Method. In particular, we find that the Parisi functional that appears ... More
Repulsion in controversial debate drives public opinion into fifty-fifty stalemateSep 13 2019Opinion formation is a process with strong implications for public policy. In controversial debates with large consequences, the public opinion is often trapped in a fifty-fifty stalemate, jeopardizing broadly accepted political decisions. Emergent effects ... More
Local Matrix Product Operators: Canonical Form, Compression, & Control TheorySep 13 2019We present a new method for compressing matrix product operators (MPOs) which represent sums of local terms, such as Hamiltonians. Just as with area law states, such local operators may be fully specified with a small amount of information per site. Standard ... More
Bath-Mediated Interactions between Driven Tracers in Dense Single-FilesSep 13 2019Single-file transport, where particles cannot bypass each other, has been observed in various experimental setups. In such systems, the behaviour of a tracer particle (TP) is subdiffusive, which originates from strong correlations between particles. These ... More
On the oddness of percolationSep 13 2019Recently Mertens and Moore [arXiv:1909.01484v1] showed that site percolation "is odd." By this they mean that on an $M\times N$ square lattice the number of distinct site configurations that allow for vertical percolation is odd. We report here an alternative ... More
Continuous time random walks and Lévy walks with stochastic resettingSep 13 2019Sep 17 2019Intermittent stochastic processes appear in a wide field, such as chemistry, biology, ecology, and computer science. This paper builds up the theory of intermittent continuous time random walk (CTRW) and L\'{e}vy walk, in which the particles are stochastically ... More
Pre-Cooling Strategy Allows Exponentially Faster HeatingSep 13 2019What is the fastest way to heat a system which is coupled to a temperature controlled oven? The intuitive answer is to use only the hottest temperature available. However, we show that often it is possible to achieve an exponentially faster heating, and ... More
A quantum heat engine based on dynamical material designSep 13 2019We propose a novel type of quantum heat engine with functionality based on dynamical material design: the swift dynamical control of the magnetic properties of a chromium oxide Cr$_{2}$O$_{3}$ which we exploit as a working substance. We use density functional ... More
Collective dynamics of phase-repulsive oscillators solves graph coloring problemSep 13 2019Recent years saw a fast development of quantum algorithms that solve combinatorial optimization problems, such as graph coloring, by finding the ground state of a suitable quantum system. Inspired by this, we show how to couple phase-oscillators on a ... More
Geometry of the parameter space of a quantum system: Classical point of viewSep 12 2019The local geometry of the parameter space of a quantum system is described by the quantum metric tensor and the Berry curvature, which are two fundamental objects that play a crucial role in understanding geometrical aspects of condensed matter physics. ... More
Uncovering atomistic mechanisms of crystallization using Machine LearningSep 12 2019The process of solidification has been used through centuries to create materials with specific shapes and compositions, since much before microscopy was able to reveal the microstructure of materials. With the maturation of computational and microscopy ... More
Anomalous localization at the boundary of an interacting topological insulatorSep 12 2019The boundary of a topological insulator (TI) hosts an anomaly restricting its possible phases: e.g. 3D strong and weak TIs maintain surface conductivity at any disorder if symmetry is preserved on-average, at least when electron interactions on the surface ... More
Subdiffusion and heat transport in a tilted 2D Fermi-Hubbard systemSep 12 2019Using quantum gas microscopy we study the late-time effective hydrodynamics of an isolated cold-atom Fermi-Hubbard system subject to an external linear potential (a "tilt"). The tilt is along one of the principal directions of the two-dimensional (2D) ... More
Slaved Coarsening in FerronematicsSep 12 2019We focus on understanding the influence of the two-component coupling in ferronematics, a colloidal suspension of magnetic nanoparticles in nematic liquid crystals. Using coarse-grained Landau-de Gennes free energies, we study the ordering dynamics of ... More
Universal effective couplings of the three-dimensional $n$-vector model and field theorySep 12 2019We calculate the universal ratios $R_{2k}$ of renormalized coupling constants $g_{2k}$ entering the critical equation of state for the generalized Heisenberg (three-dimensional $n$-vector) model. Renormalization group (RG) expansions of $R_8$ and $R_{10}$ ... More
Ecological communities from random Lotka-Volterra dynamics with nonlinear functional responseSep 12 2019We investigate the outcome of Lotka-Volterra dynamics of ecological communities with random interaction coefficients and non-linear functional response. We show in simulations that the saturation of Holling type-II response stabilises the dynamics. This ... More
Stationary distributions of continuous-time Markov chains: a review of theory and truncation-based approximationsSep 12 2019Computing the stationary distributions of a continuous-time Markov chain involves solving a set of linear equations. In most cases of interest, the number of equations is infinite or too large, and cannot be solved analytically or numerically. Several ... More
Effect of surface morphology on kinetic compensation effectSep 12 2019As part of a systematic study on the kinetic compensation effect, we use kinetic Monte Carlo simulations to observe the effects of substrate topology on the transient variations in the Arrhenius parameters - effective activation energy $E_{a}$, and preexponential ... More
Time between the maximum and the minimum of a stochastic processSep 12 2019We present an exact solution for the probability density function $P(\tau=t_{\min}-t_{\max}|T)$ of the time-difference between the minimum and the maximum of a one-dimensional Brownian motion of duration $T$. We then generalise our results to a Brownian ... More
Equations of state for ruthenium and rhodiumSep 11 2019Ru and Rh are interesting cases for comparing equations of state (EOS), because most general purpose EOS are semi-empirical, relying heavily on shock data, and none has been reported for Ru. EOS were calculated for both elements using all-electron atom-in-jellium ... More
Quantum fluctuations inhibit symmetry breaking in the HMF modelSep 11 2019It is widely believed that mean-field theory is exact for a wide-range of classical long-range interacting systems. Is this also true once quantum fluctuations have been accounted for? As a test case we study the Hamiltonian Mean Field (HMF) model for ... More
Anomalous low-frequency conductivity in easy-plane XXZ spin chainsSep 11 2019In the easy-plane regime of XXZ spin chains, spin transport is ballistic, with a Drude weight that has a discontinuous fractal dependence on the value of the anisotropy $\Delta = \cos \pi \lambda$ at nonzero temperatures. We show that this structure necessarily ... More
Oscillations in feedback driven systems: thermodynamics and noiseSep 11 2019Oscillations in nonequilibrium noisy systems are important physical phenomena. These oscillations can happen in autonomous biochemical oscillators such as circadian clocks. They can also manifest as subharmonic oscillations in periodically driven systems ... More
Quantum statistics of vortices from a dual theory of the XY ferromagnetSep 11 2019We extend the well-known mapping between the easy-plane ferromagnet and electrostatics in $d=2$ spatial dimensions to dynamical and quantum phenomena in a $d=2+1$ spacetime. Ferromagnetic vortices behave like quantum particles with an electric charge ... More
Correlations and Memory Effects in Active Processes with Distinct Motility StatesSep 11 2019The stochastic dynamics of active particles with distinct motility states is studied analytically. A theoretical framework is developed to describe a generic class of stochastic processes consisting of two states characterized by their activity coefficients ... More
Pore-Scale Flow Characterization of Polymer Solutions in Microfluidic Porous MediaSep 11 2019Polymer solutions are frequently used in enhanced oil recovery and groundwater remediation to improve the recovery of trapped non-aqueous fluids. However, applications are limited by an incomplete understanding of the flow in porous media. The tortuous ... More
The three-state Potts model on the centered triangular latticeSep 11 2019We study phase transitions of the Potts model on the centered-triangular lattice with two types of couplings, namely $K$ between neighboring triangular sites, and $J$ between the centered and the triangular sites. Results are obtained by means of a finite-size ... More
Deep learning of topological phase transitions from entanglement aspectsSep 10 2019The one-dimensional $p$-wave superconductor proposed by Kitaev has long been a classic example for understanding topological phase transitions through various methods, such as examining Berry phase, edge states of open chains and, in particular, aspects ... More
Entanglement production by interaction quenches of quantum chaotic subsystemsSep 10 2019The entanglement production in bipartite quantum systems is studied for initially unentangled product eigenstates of the subsystems, which are assumed to be quantum chaotic. Based on a perturbative computation of the Schmidt eigenvalues of the reduced ... More
Estimating configurational entropy and energy of molecular systems from computed spectral densitySep 10 2019Most methods for estimating configurational entropy from molecular simulation data yield upper limits except for harmonic systems where they are exact. Problems arise at diffusive systems and the presence of conformational transitions. Covariance-based ... More
On a class of random walks with reinforced memorySep 10 2019This paper deals with different models of random walks with a reinforced memory of preferential attachment type. We consider extensions of the Elephant Random Walk introduced by Sch\"utz and Trimper [2014] with a stronger reinforcement mechanism, where, ... More
Age representation of Levy walks: partial density waves, relaxation and first passage time statisticsSep 10 2019Levy walks (LWs) define a fundamental class of finite velocity stochastic processes that can be introduced as a special case of continuous time random walks. Alternatively, there is a hyperbolic representation of them in terms of partial probability density ... More
Nonlinear thermoelectricity with particle-hole symmetry in transportSep 10 2019In the linear regime, thermo-electric effects between two conductors are possible only in the presence of an explicit breaking of the electron-hole symmetry which results in the property $I(V)\neq -I(-V)$. We consider a tunnel junction between two electrodes ... More
Crossover from fast to slow dynamics in quantum Ising chains with long range interactionsSep 10 2019Quantum many body systems with long range interactions are known to display many fascinating phenomena experimentally observable in trapped ions, Rydberg atoms and polar molecules. Among these are dynamical phase transitions which occur after an abrupt ... More
Random Walk Equivalence to the Compressible Baker Map and the Kaplan-Yorke Approximation to Its Information DimensionSep 10 2019Sep 11 2019Hoover and Posch studied a single deterministic compressible time-reversible version of Eberhard Hopf's "Baker Map". This particular version was selected to serve as a "Toy Model" of nonequilibrium molecular dynamics. Iterating the map generates an ergodic ... More
Random Walk Equivalence to the Compressible Baker Map and the Kaplan-Yorke Approximation to Its Information DimensionSep 10 2019Hoover and Posch studied a single deterministic compressible time-reversible version of Eberhard Hopf's "Baker Map". This particular version was selected to serve as a "Toy Model" of nonequilibrium molecular dynamics. Iterating the map generates an ergodic ... More
Transport of probe particles in polymer network: effects of probe size, network rigidity and probe-polymer interactionSep 10 2019Fundamental understanding of the effect of microscopic parameters on the dynamics of probe particles in different complex environments has wide implications. Examples include diffusion of proteins in the biological hydrogels, porous media, polymer matrix, ... More
Oscillatory Instabilities in 3-Dimensional Frictional Granular MatterSep 10 2019The dynamics of amorphous granular matter with frictional interactions cannot be derived in general from a Hamiltonian and therefore displays oscillatory instabilities stemming from the onset of complex eigenvalues in the stability matrix. These instabilities ... More
Generalized Gibbs Ensemble and string-charge relations in nested Bethe AnsatzSep 10 2019Sep 18 2019The non-equilibrium steady states of integrable models are believed to be described by the Generalized Gibbs Ensemble (GGE), which involves all local and quasi-local conserved charges of the model. In this work we investigate integrable lattice models ... More
Generalized Gibbs Ensemble and string-charge relations in nested Bethe AnsatzSep 10 2019The non-equilibrium steady states of integrable models are believed to be described by the Generalized Gibbs Ensemble (GGE), which involves all local and quasi-local conserved charges of the model. In this work we investigate integrable lattice models ... More
On the phase diagram of the random bond $q$-state Potts modelSep 10 2019We consider the two-dimensional random bond $q$-state Potts model within the recently introduced exact framework of scale invariant scattering, exhibit the line of stable fixed points induced by disorder for arbitrarily large values of $q$, and examine ... More
Complete Set of Stochastic Verlet-Type Thermostats for Correct Langevin SimulationsSep 10 2019We present the complete set of stochastic Verlet-type algorithms that can provide correct statistical measures for both configurational and kinetic sampling in discrete-time Langevin systems. The approach is a brute-force general representation of the ... More
Discrete time crystals in many-body quantum chaosSep 10 2019Discrete time crystals (DTCs) are new phases of matter characterized by the presence of an observable evolving with $nT$ periodicity under a $T$-periodic Hamiltonian, where $n>1$ is an integer insensitive to small parameter variations. In particular, ... More
Configurational Geometry Bridges Equilibrium Structure Information from a Single to Multiple CompositionsSep 10 2019For classical discrete systems under constant composition, a set of microscopic state dominantly contributing to thermodynamically equilibrium structure should depend on temperature and energy through Boltzmann factor, exp(-bE). Despite this fact, our ... More
Anomalous finite-size scaling in the Fortuin-Kasteleyn clusters of the five-dimensional Ising model with periodic boundary conditionsSep 10 2019We present a Monte Carlo study of the Fortuin-Kasteleyn Ising model on a five-dimensional ($d=5$) hypercubic lattice with linear size $L$ and periodic boundary conditions. Our numerical results show that, at the critical point, the size of the largest ... More
Effective Floquet Hamiltonian in the low-frequency regimeSep 10 2019Sep 17 2019We develop a theory to derive effective Floquet Hamiltonians in the weak drive and low-frequency regime. We construct the theory in analogy with band theory for electrons in a spatially-periodic and weak potential, such as occurs in some crystalline materials. ... More
Effective Floquet Hamiltonian in the low-frequency regimeSep 10 2019We develop a theory to derive effective Floquet Hamiltonians in the weak drive and low-frequency regime. We construct the theory in analogy with band theory for electrons in a spatially-periodic and weak potential, such as occurs in some crystalline materials. ... More
Contraction: a Unified Perspective of Correlation Decay and Zero-Freeness of 2-Spin SystemsSep 10 2019We study complex zeros of the partition function of 2-spin systems, viewed as a multivariate polynomial in terms of the edge interaction parameters and the uniform external field. We obtain new zero-free regions in which all these parameters are complex-valued. ... More
Non-equilibrium diffusion characteristics of a particle system and the correspondence to a social systemSep 10 2019A Langevin equation is suggested to describe a system driven by correlated Gaussian white noise as well as with positive and negative damping demarcated by a critical velocity. The equation can be transformed into the Fokker-Planck equation by the Kramers-Moyal ... More
Multicomponent compact Abelian-Higgs lattice modelsSep 09 2019We investigate the phase diagram and critical behavior of three-dimensional multicomponent Abelian-Higgs models, in which an N-component complex field z_x^a of unit length and charge is coupled to compact quantum electrodynamics in the usual Wilson lattice ... More
Scars in strongly driven Floquet matter: resonance vs emergent conservation lawsSep 09 2019We consider a clean quantum system subject to strong periodic driving. The existence of a dominant energy scale, $h_D^x$, can generate considerable structure in an effective description of a system which, in the absence of the drive, is non-integrable, ... More
Training Deep Neural Networks by optimizing over nonlocal paths in hyperparameter spaceSep 09 2019Hyperparameter optimization is both a practical issue and an interesting theoretical problem in training of deep architectures. Despite many recent advances the most commonly used methods almost universally involve training multiple and decoupled copies ... More
Asymmetric butterfly velocities in 2-local HamiltoniansSep 09 2019The speed of information propagation is finite in quantum systems with local interactions. In many such systems, local operators spread ballistically in time and can be characterized by a ``butterfly velocity", which can be measured via out-of-time-ordered ... More
Dynamical correlations and pairwise theory for the symbiotic contact process on networksSep 09 2019The two-species symbiotic contact process (2SCP) is a stochastic process where each vertex of a graph may be vacant or host at most one individual of each species. Vertices with both species have a reduced death rate, representing a symbiotic interaction, ... More
Dynamical correlations and pairwise theory for the symbiotic contact process on networksSep 09 2019Sep 11 2019The two-species symbiotic contact process (2SCP) is a stochastic process where each vertex of a graph may be vacant or host at most one individual of each species. Vertices with both species have a reduced death rate, representing a symbiotic interaction, ... More
Condensation vs Ordering: From the Spherical Models to BEC in the Canonical and Grand Canonical EnsembleSep 09 2019In this paper we take a fresh look at the long standing issue of the nature of macroscopic density fluctuations in the grand canonical treatment of the Bose-Einstein condensation (BEC). Exploiting the close analogy between the spherical and mean-spherical ... More
Probing the large deviations of the Kardar-Parisi-Zhang equation at short time with an importance sampling of directed polymers in random mediaSep 09 2019The one-point distribution of the height for the continuum Kardar-Parisi-Zhang (KPZ) equation is determined numerically using the mapping to the directed polymer in a random potential at high temperature. Using an importance sampling approach, the distribution ... More
Kardar-Parisi-Zhang physics in integrable rotationally symmetric dynamics on discrete space-time latticeSep 09 2019We introduce a deterministic SO(3) invariant dynamics of classical spins on a discrete space-time lattice and prove its complete integrability by explicitly finding a related non-constant (baxterized) solution of the set-theoretic quantum Yang-Baxter ... More
Fluctuation-Dissipation Relation and Hawking EffectSep 09 2019We show a direct connection between Kubo's fluctuation-dissipation relation and Hawking effect that is valid in any dimensions. The relevant correlators, computed from the known expressions for the stress tensor, are shown to satisfy the Kubo relation, ... More
Phoretic Active MatterSep 09 2019These notes are an account of a series of lectures given at the Les Houches Summer School ``Active Matter and Non-equilibrium Statistical Physics'' during August and September 2018. The lectures can be viewed online at [http://www.ds.mpg.de/lmp/lectures/les-houches-2018]. ... More
On the Fluctuation-Dissipation Relation in non-equilibrium and non-Hamiltonian systemsSep 09 2019We review generalized Fluctuation-Dissipation Relations which are valid under general conditions even in ``non-standard systems'', e.g. out of equilibrium and/or without a Hamiltonian structure. The response functions can be expressed in terms of suitable ... More
Dissipation controls transport and phase transitions in active fluids: Mobility, diffusion and biased ensemblesSep 09 2019Active fluids operate by constantly dissipating energy at the particle level to perform a directed motion, yielding dynamics and phases without any equilibrium equivalent. The emerging behaviors have been studied extensively, yet deciphering how local ... More
Hard-core collisional dynamics in the hamiltonian mean-field modelSep 09 2019We consider a modification of the well studied Hamiltonian Mean-Field model by introducing a hard-core point-like repulsive interaction and propose a numerical integration scheme to integrate numerically its dynamics. Our results show that the outcome ... More
Action Functional for a Particle with DampingSep 09 2019In this brief report we discuss the action functional of a particle with damping, showing that it can be obtained from the dissipative equation of motion through a modification which makes the new dissipative equation invariant for time reversal symmetry. ... More
Action Functional for a Particle with DampingSep 09 2019Sep 10 2019In this brief report we discuss the action functional of a particle with damping, showing that it can be obtained from the dissipative equation of motion through a modification which makes the new dissipative equation invariant for time reversal symmetry. ... More
Thermal rectification in thermodynamic limitSep 09 2019We show that an increasingly strong thermal rectification effect occurs in the thermodynamic limit in a one-dimensional, graded rotor lattice with nearest-neighboring interactions only. The underlying mechanism is related to the transition from normal ... More
Variational control forces for enhanced sampling of nonequilibrium molecular dynamics simulationsSep 09 2019We introduce a variational algorithm to estimate the likelihood of a rare event within a nonequilibrium molecular dynamics simulation through the evaluation of an optimal control force. Optimization of a control force within a chosen basis is made possible ... More
Nucleation and shape dynamics of model nematic tactoids around adhesive colloidsSep 08 2019Recent experiments have shown how nematically-ordered tactoid shaped actin droplets can be reorganized and divided by the action of myosin molecular motors. In this paper, we consider how similar morphological changes can potentially be achieved under ... More
New exact results for the two-phase model with several conserved currentsSep 08 2019We consider the macroscopic transport properties of two-dimensional random binary mixtures with identical spatial distributions of the two phases. Previous studies have obtained exact analytical results for the electrical conductivity of a single layer ... More