Latest in cond-mat.stat-mech

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The sum of log-normal variates in geometric Brownian motionFeb 08 2018Geometric Brownian motion (GBM) is a key model for representing self-reproducing entities. Self-reproduction may be considered the definition of life [5], and the dynamics it induces are of interest to those concerned with living systems from biology ... More
Neural Network Renormalization GroupFeb 08 2018We present a variational renormalization group approach using deep generative model composed of bijectors. The model can learn hierarchical transformations between physical variables and renormalized collective variables. It can directly generate statistically ... More
Comment on "Phase Control of Directed Diffusion in a Symmetric Optical Lattice"Feb 08 2018Comment on the paper Schiavoni et al., Phys. Rev. Lett. 90, 094101 (2003).
Potential Energy Landscape of TIP4P/2005 waterFeb 08 2018We report an exhaustive numerical study of the statistical properties of the potential energy landscape of TIP4P/2005, one of the most accurate rigid water models. We show that, in the region where equilibrated configurations can be generated, a Gaussian ... More
Transient dynamics of electric double layer capacitors: Exact expressions within the Debye-Falkenhagen approximationFeb 08 2018We revisit a classical problem of theoretical electrochemistry: the response of an electric double layer capacitor (EDLC) subject to a small, suddenly-applied external potential. We solve the Debye-Falkenhagen equation to obtain exact expressions for ... More
Stochastic control in microscopic nonequilibrium systemsFeb 07 2018Quantifying energy flows at nanometer scales promises to guide future research in a variety of disciplines, from microscopic control and manipulation, to autonomously operating molecular machines. A general understanding of the thermodynamic costs of ... More
Multipartite entanglement in spin chains and the HyperdeterminantFeb 07 2018A way to characterize multipartite entanglement in pure states of a spin chain with $n$ sites and local dimension $d$ is by means of the Cayley hyperdeterminant. The latter quantity is a polynomial constructed with the components of the wave function ... More
Correlations of occupation numbers in the canonical ensemble and application to BEC in a 1D harmonic trapFeb 07 2018We study statistical properties of $N$ non-interacting identical bosons or fermions in the canonical ensemble. We derive several general representations for the $p$-point correlation function of occupation numbers $\overline{n_1\cdots n_p}$. We demonstrate ... More
Analysis of stochastic bifurcations with phase portraitsFeb 07 2018We propose a method to obtain phase portraits for stochastic systems. Starting from the Fokker-Planck equation, we separate the dynamics into a convective and a diffusive part. We show that stable and unstable fixed points of the convective field correspond ... More
Critical phases in the raise and peel modelFeb 07 2018The raise and peel model (RPM) is a nonlocal stochastic model describing the space and time fluctuations of an evolving one dimensional interface. Its relevant parameter $u$ is the ratio between the rates of local adsorption and nonlocal desorption processes ... More
Activity induced synchronizationFeb 07 2018Synchronization, the emergence of temporally coordinated behavior in large populations of interacting elements, occurs on many different length scales, from biological to social systems, generating phenomena like the unison flashing of fireflies, the ... More
Large-deviation Properties of Linear-programming Computational Hardness of the Vertex Cover ProblemFeb 07 2018The distribution of the computational cost of linear-programming (LP) relaxation for vertex cover problems on Erdos-Renyi random graphs is evaluated by using the rare-event sampling method. As a large-deviation property, differences of the distribution ... More
A structural test for the conformal invariance of the critical 3d Ising modelFeb 07 2018How can a renormalization group fixed point be scale invariant without being conformal? Polchinski (1988) showed that this may happen if the theory contains a virial current -- a non-conserved vector operator of dimension exactly $(d-1)$, whose divergence ... More
Critical Percolation as a Framework to Analyze the Training of Deep NetworksFeb 06 2018In this paper we approach two relevant deep learning topics: i) tackling of graph structured input data and ii) a better understanding and analysis of deep networks and related learning algorithms. With this in mind we focus on the topological classification ... More
Conformal invariance and the Lundgren-Monin-Novikov equations for vorticity fields in 2D turbulence: Refuting a recent claimFeb 06 2018The recent claim by Grebenev et al. [J. Phys. A: Math. Theor. 50, 435502 (2017)] that the inviscid 2D Lundgren-Monin-Novikov (LMN) equations on a zero vorticity characteristic naturally would reveal local conformal invariance when only analyzing these ... More
Exact local correlations and full counting statistics for arbitrary states of the one-dimensional interacting Bose gasFeb 06 2018We derive exact analytic expressions for the $n$-body local correlations in the one-dimensional Bose gas with contact repulsive interactions (Lieb-Liniger model) in the thermodynamic limit. Our results are valid for arbitrary states of the model, including ... More
High-precision simulation of the height distribution for the KPZ equationFeb 06 2018The 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
Lossless Brownian information engineFeb 06 2018We report on a lossless information engine that converts nearly all available information from an error-free feedback protocol into mechanical work. Combining high-precision detection at resolution of 1 nm with ultrafast feedback control, the engine is ... More
Dense Power-law Networks and Simplicial ComplexesFeb 05 2018There is increasing evidence that dense networks occur in on-line social networks, recommendation networks and in the brain. In addition to being dense, these networks are often also scale-free, i.e. their degree distributions follow $P(k)\propto k^{-\gamma}$ ... More
Percolation transition in two dimensional electron gas: A quantum cellular automaton modelFeb 04 2018A new type of disorder-driven electronic percolation transition is found for two-dimensional electron gas (2DEG), based on a quantum cellular automaton model. This transition is shown to be accompanied with a metal-insulator transition, as well as a singularity ... More
Interaction-disorder-driven characteristic momentum in graphene, approach of multi-body distribution functionsFeb 04 2018Multi-point probability measures along with the dielectric function of Dirac Fermions in mono-layer graphene containing particle-particle and white-noise (out-plane) disorder interactions on an equal footing in the Thomas-Fermi-Dirac approximation is ... More
The Discontinuous Asymptotic Telegraphers Equation ($P_1$) ApproximationFeb 04 2018Modeling the propagation of radiative heat-waves in optically thick material using a diffusive approximation is a well-known problem. In an optically thin material, classic methods, such as classic diffusion or classic $P_1$ yield the wrong heat wave ... More
Integrable time-dependent Hamiltonians, solvable Landau-Zener models and Gaudin magnetsFeb 03 2018We solve the non-stationary Schrodinger equation for several time-dependent Hamiltonians, such as the BCS Hamiltonian with an interaction strength inversely proportional to time, periodically driven BCS and linearly driven inhomogeneous Dicke models as ... More
Lipid-protein interaction induced domains: kinetics and conformational changes in multicomponent vesiclesFeb 03 2018The spatio-temporal organization of proteins and the associated morphological changes in membranes are of importance in cell signaling. Several mechanisms that promote the aggregation of proteins at low cell surface concentrations have been investigated ... More
$^{31}$P NMR study of discrete time-crystalline signatures in an ordered crystal of ammonium dihydrogen phosphateFeb 01 2018The rich dynamics and phase structure of driven systems includes the recently-described phenomenon of the "discrete time crystal" (DTC), a robust phase which spontaneously breaks the discrete time translation symmetry of its driving Hamiltonian. Experiments ... More
Fermion-induced quantum criticality with two length scales in Dirac systemsFeb 01 2018The quantum phase transition to a $\mathbb{Z}_3$-ordered Kekul\'e valence bond solid in two-dimensional Dirac semimetals is governed by a fermion-induced quantum critical point, which renders the putatively discontinuous transition continuous. We study ... More
Complex Network Geometry and Frustrated SynchronizationFeb 01 2018The dynamics of networks of neuronal cultures has been recently shown to be strongly dependent on the network geometry and in particular on their dimensionality. However, this phenomenon has been so far mostly unexplored from the theoretical point of ... More
Fermi-Pasta-Ulam chains with harmonic and anharmonic long-range interactionsFeb 01 2018We study the dynamics of Fermi-Pasta-Ulam (FPU) chains with both harmonic and anharmonic power-law long-range interactions. We show that the dynamics is described in the continuum limit by a Generalized Fractional Boussinesq differential Equation (GFBE), ... More
Current fluctuations in boundary-driven quantum spin chainsJan 31 2018Boundary-driven spin chains are paradigmatic non-equilibrium systems in both classical and quantum settings. In general it may not be possible to distinguish classical from quantum transport through monitoring the mean current, as both ballistic as well ... More
Exotic Superconductivity with Enhanced Energy Scales in Three Band Crossing MaterialsJan 31 2018Three band crossings can arise in three dimensional quantum materials with certain space group symmetries. The low energy Hamiltonian supports spin one fermions and a flat band. We study the pairing problem in this setting. We write down a minimal BCS ... More
Lindbladians with multiple steady states: theory and applicationsJan 31 2018Markovian master equations, often called Liouvillians or Lindbladians, are used to describe decay and decoherence of a quantum system induced by that system's environment. While a natural environment is detrimental to fragile quantum properties, an engineered ... More
Introducing particle flexibility into a density functional description of nematics and cholestericsJan 31 2018Feb 02 2018We describe a general implementation of the Fynewever-Yethiraj density functional theory (DFT) for the investigation of nematic and cholesteric self-assembly in arbitrary solutions of semi-flexible polymers. The basic assumptions of the theory are discussed ... More
Landau-Ginzburg theory of cortex dynamics: Scale-free avalanches emerge at the edge of synchronizationJan 31 2018Understanding the origin, nature, and functional significance of complex patterns of neural activity, as recorded by diverse electrophysiological and neuroimaging techniques, is a central challenge in neuroscience. Such patterns include collective oscillations ... More
Harmonic oscillators from displacement operators and thermodynamicsJan 30 2018In this investigation, the displacement operator is revisited. We established a connection of the Hermitian version of this operator with the well-known Weyl ordering. Besides, we characterized the quantum properties of a simple displaced harmonic oscillator, ... More
Massively parallel symplectic algorithm for coupled magnetic spin dynamics and molecular dynamicsJan 30 2018A parallel implementation of coupled spin-lattice dynamics in the LAMMPS molecular dynamics package is presented. The equations of motion for both spin only and coupled spin-lattice dynamics are first reviewed, including a detailed account of how magneto-mechanical ... More
Noise-robust quantum sensing via optimal multi-probe spectroscopyJan 30 2018The dynamics of quantum systems are unavoidably influenced by their environment and in turn observing a quantum system (probe) can allow one to measure its environment: Measurements and controlled manipulation of the probe such as dynamical decoupling ... More
Properties of additive functionals of Brownian motion with resettingJan 30 2018We study the distribution of time-additive functionals of reset Brownian motion, a variation of normal Brownian motion in which the path is interrupted at a given rate according to a Poisson process and placed back to a given reset position. For three ... More
Do the contact angle and line tension of surface-attached droplets depend on the radius of curvature?Jan 30 2018Results from Monte Carlo simulations of wall-attached droplets in the three-dimensional Ising lattice gas model and in a symmetric binary Lennard-Jones fluid, confined by antisymmetric walls, are analyzed, with the aim to estimate the dependence of the ... More
Multicritical point on the de Almeida-Thouless line in spin glasses in $d>6$ dimensionsJan 29 2018The de Almeida-Thouless (AT) line in Ising spin glasses is the phase boundary in the temperature $T$ and magnetic field $h$ plane below which replica symmetry is broken. Using perturbative renormalization group (RG) methods, we show that when the dimension ... More
Impact of roughness on the instability of a free-cooling granular gasJan 29 2018A linear stability analysis of the hydrodynamic equations with respect to the homogeneous cooling state is carried out to identify the conditions for stability of a granular gas of rough hard spheres. The description is based on the results for the transport ... More
Coupling of $c=-2$ and $c=\frac{1}{2}$ and $c=0$ conformal field theories: The geometrical point of viewJan 26 2018The coupling of the $c=-2$, $c=\frac{1}{2}$ and $c=0$ conformal field theories are numerically considered in this paper. As the prototypes of the couplings, $(c_1=-2)\oplus (c_2=0)$ and $(c_1=-2)\oplus (c_2=\frac{1}{2})$, we consider the BTW model on ... More
Sandpile on uncorrelated site-diluted percolation lattice; From three to two dimensionsJan 26 2018The BTW sandpile model is considered on three dimensional percolation lattice which is tunned with the occupation parameter $p$. Along with the three-dimensional avalanches, we study the energy propagation in two-dimensional cross-sections. We use the ... More
Statistical Investigation of Avalanches of Three Dimensional Small-World Networks and their Boundary and Bulk Cross-SectionsJan 26 2018In many situations we are interested in the propagation of energy in some portions of a three dimensional system with dilute long-range links. In this paper sandpile model is defined on the three-dimensional small world network with real dissipative boundaries ... More
Self-Avoiding Walk on the square site-diluted Ising-correlated latticeJan 26 2018The self-avoiding walk on the square site-diluted correlated percolation lattice is considered. The Ising model is employed to realize the spatial correlations of the metric space. As a well-accepted result, the (generalized) Flory's mean field relation ... More
Power spectrum of rare events in two-dimensional BTW model, violation of $1/f$ noise hypothesisJan 26 2018One of the primitive aims of the two-dimensional BTW model had been to explain the $1/f^{\alpha}$ noise which is widely seen in the natural systems. In this paper we study some time signals, namely the activity inside an avalanche ($x(t)$), the avalanches ... More
Isotropic-nematic transition of self-propelled rods in three dimensionsJan 26 2018Using overdamped Brownian dynamics simulations we investigate the isotropic-nematic (IN) transition of self-propelled rods in three spatial dimensions. For two well-known model systems (Gay-Berne potential and hard spherocylinders) we find that turning ... More
Yet Another Approach to Loschmidt's ParadoxJan 26 2018Time reversal symmetry of microscopic motion is not violated by entropy "growth" of statistical mechanics. Non-equilibrium state is a local minimum of the system entropy: its first-order time derivative is zero $\dot{S}=0$, while the second order derivative ... More
Structural behavior of supercritical fluids under confinementJan 25 2018The location of the Frenkel line (FL) of a Lennard-Jones fluid which demarcates two distinct physical states, liquidlike and gaslike within the supercritical regime, has been established through molecular dynamics (MD) simulations of the velocity auto-correlation ... More
Coarse-grained patterns in multiplex networksJan 25 2018A new class of patterns for multiplex networks is studied, which consists in a collection of different homogeneous states each referred to a distinct layer. The associated stability diagram exhibits a tricritical point, as a function of the inter-layer ... More
Dynamic recrystallization in adiabatic shear banding: effective-temperature model and comparison to experiments in ultrafine-grained titaniumJan 25 2018Dynamic recrystallization (DRX) is often observed in conjunction with adiabatic shear banding (ASB) in polycrystalline materials. The recrystallized nanograins in the shear band have few dislocations compared to the material outside of the shear band. ... More
Convenient Interface to Inverse Ising (ConIII): A Python package for solving maximum entropy modelsJan 24 2018ConIII (pronounced CON-ee) is an open-source Python project providing a simple interface to solving maximum entropy models, with a focus on the Ising model. We describe the maximum entropy problem and give an overview of the algorithms that are implemented ... More
From Heavy-Ion Collisions to Compact Stars: Equation of State and Relevance of the System SizeJan 24 2018In this article, we start by presenting state-of-the-art methods allowing us to compute moments related to the globally conserved baryon number, by means of first principle resummed perturbative frameworks. We focus on such quantities for they convey ... More
The Enskog equation for confined elastic hard spheresJan 24 2018A kinetic equation for a system of elastic hard spheres or disks confined by a hard wall of arbitrary shape is derived. It is a generalization of the modified Enskog equation in which the effects of the confinement are taken into account and it is supposed ... More
Energy-temperature uncertainty relation in quantum thermodynamicsJan 24 2018Feb 02 2018Much like Heisenberg's uncertainty principle in quantum mechanics, there exists the thermodynamic uncertainty relation in classical statistical mechanics that limits simultaneous estimations of energy and temperature for a system in equilibrium. However, ... More
Many-body localization, symmetry, and topologyJan 23 2018We review recent developments in the study of out-of-equilibrium topological states of matter in isolated systems. The phenomenon of many-body localization, exhibited by some isolated systems usually in the presence of quenched disorder, prevents systems ... More
Multicritical points of the O(N) scalar theory in $2<d<4$ for large NJan 23 2018We solve analytically the renormalization-group equation for the potential of the O(N)-symmetric scalar theory in the large-N limit and in dimensions 2<d<4, in order to look for nonperturbative fixed points that were found numerically in a recent study. ... More
Time-dependent generalized Gibbs ensembles in open quantum systemsJan 23 2018Generalized Gibbs ensembles have been used as powerful tools to describe the steady state of integrable many-particle quantum systems after a sudden change of the Hamiltonian. Here we demonstrate numerically, that they can be used for a much broader class ... More
Quantized Self-Assembly of Discotic Rings in a Liquid Crystal Confined in NanoporesJan 23 2018Disklike molecules with aromatic cores spontaneously stack up in linear columns with high, one-dimensional charge carrier mobilities along the columnar axes making them prominent model systems for functional, self-organized matter. We show by high-resolution ... More
A dissipative environment may improve the quantum annealing performances of the ferromagnetic p-spin modelJan 23 2018We investigate the quantum annealing of the ferromagnetic $ p $-spin model in a dissipative environment ($ p = 5 $ and $ p = 7 $). This model, in the large $ p $ limit, codifies the Grover's algorithm for searching in an unsorted database. The dissipative ... More
First-order phase transition by a spin-flip potential in BCS superconductivityJan 23 2018A spin-flip potential $V$ is introduced in a BCS Hamiltonian in order to study a possible thermodynamic effect that might be caused by the addition of a magnetic impurity in a superconductor. We found that the competition between the pairing and the spin-flip ... More
The quasi-periodic quantum Ising transition in 1DJan 22 2018Unlike random potentials, quasi-periodic modulation can induce localisation-delocalisation transitions in one dimension. In this article, we analyse the implications of this for symmetry breaking in the quasi-periodically modulated quantum Ising chain. ... More
Ballistic transport in the classical Toda chain with harmonic pinningJan 22 2018We investigate, via numerical simulation, heat transport in the nonequilibrium stationary state (NESS) of the 1D classical Toda chain with an additional pinning potential, which destroys momentum conservation. The NESS is produced by coupling the system, ... More
Hard competition: stabilizing the elusive biaxial nematic phase in suspensions of colloidal particles with extreme lengthsJan 22 2018Jan 26 2018We use computer simulations to study the existence and stability of a biaxial nematic $N_b$ phase in systems of hard polyhedral cuboids, triangular prisms, and rhombic platelets, characterized by a long ($L$), medium ($M$), and short ($S$) particle axis. ... More
Entanglement entropy in the Long-Range Kitaev chainJan 22 2018In this paper we complete the study on the asymptotic behaviour of the entanglement entropy for Kitaev chains with long range pairing. We discover that when the couplings decay with the distance with a critical exponent new properties for the asymptotic ... More
Floquet Engineering in Quantum ChainsJan 21 2018We consider a one-dimensional interacting spinless fermion model, which displays the well-known Luttinger liquid (LL) to charge density wave (CDW) transition as a function of the ratio between the strength of the interaction, $U$, and the hopping, $J$. ... More
Density profiles of self-gravitating lattice gas in one, two, and three dimensionsJan 21 2018We consider a lattice gas in spaces of dimensionality $\mathcal{D}=1,2,3$. The particles are subject to a hardcore exclusion interaction and an attractive pair interaction that satisfies Gauss' law as do Newtonian gravity in $\mathcal{D}=3$, a logarithmic ... More
Maximally Random Discrete-Spin Systems with Symmetric and Asymmetric Interactions and Maximally Degenerate OrderingJan 20 2018Discrete-spin systems with maximally random nearest-neighbor interactions that can be symmetric or asymmetric, ferromagnetic or antiferromagnetic, including off-diagonal disorder, are studied, for the number of states $q=3,4$ in $d$ dimensions. We use ... More
A high-performance analog Max-SAT solver and its application to Ramsey numbersJan 20 2018Jan 28 2018We introduce a continuous-time analog solver for MaxSAT, a quintessential class of NP-hard discrete optimization problems, where the task is to find a truth assignment for a set of Boolean variables satisfying the maximum number of given logical constraints. ... More
Langevin dynamics with spatial correlations as a model for electron-phonon couplingJan 20 2018Stochastic Langevin dynamics has been traditionally used as a tool to describe non-equilibrium processes. When utilized in systems with collective modes, traditional Langevin dynamics relaxes all modes indiscriminately, regardless of its wavelength. We ... More
Ehrenfest statistical dynamics in chemistry: study of decoherence effects and of its equilibrium distributionJan 18 2018We investigate decoherence, pointer states and the equilibrium distribution in the Ehrenfest Statistical Dynamics (ESD) model by considering ensembles of trajectories of simple but realistic molecular models, consisting of two classical cores and one ... More
Anomalous Exponents in Strong Turbulence in an Infinite Fluid Driven by a Gaussian Random ForceJan 17 2018To characterize fluctuations in a turbulent flow, one usually studies different moments of velocity increments and/or dissipation rate, $\overline{(v(x+r)-v(x))^{n}}\propto r^{\zeta_{n}}$ and $\overline{{\cal E}^{n}}\propto Re^{d_{n}}$, respectively. ... More
Characterization of Time Series Via Rényi Complexity-Entropy CurvesJan 17 2018One of the most useful tools for distinguishing between chaotic and stochastic time series is the so-called complexity-entropy causality plane. This diagram involves two complexity measures: the Shannon entropy and the statistical complexity. Recently, ... More
Controlling polyelectrolyte adsorption onto carbon nanotubes by tuning ion-image interactionsJan 17 2018Understanding and controlling polyelectrolyte adsorption onto carbon nanotubes is a fundamen- tal challenge in nanotechology. Polyelectrolytes have been shown to stabilise nanotube suspensions through adsorbing onto the nanotube surface, and polyelectrolyte-coated ... More
The Stretch to Stray on Time: Resonant Length of Random Walks in a TransientJan 16 2018First-passage times in random walks have a vast number of diverse applications in physics, chemistry, biology, and finance. In general, environmental conditions for a stochastic process are not constant on the time scale of the average first-passage time, ... More
The Fermi-Pasta-Ulam problem and its underlying integrable dynamics: an approach through Lyapunov ExponentsJan 16 2018FPU models, in dimension one, are perturbations either of the linear model or of the Toda model; perturbations of the linear model include the usual $\beta$-model, perturbations of Toda include the usual $\alpha+\beta$ model. In this paper we explore ... More
Self-Consistent Description of Local Density Dynamics in Simple Liquids. The Case of Molten LithiumJan 15 2018The dynamic structure factor is the quantity, which can be measured by means of Brillouin light-scattering as well as by means of inelastic scattering of neutrons and X-rays. The spectral (or frequency) moments of the dynamic structure factor define directly ... More
Bohmian pathways into chemistry: A brief overviewJan 15 2018Perhaps because of the popularity that trajectory-based methodologies have always had in Chemistry and the important role they have played, Bohmian mechanics has been increasingly accepted within this community, particularly in those areas of the theoretical ... More
Analyzing effect of Imperfections on the Landauer's BoundJan 09 2018This article analyzes the effect of \lq imperfections\rq \ on the minimum heat dissipation associated with quasi static erasure of a single bit of information. A Brownian particle in a double well potential is used as a representation for a single bit ... More
Transport through Periodically Driven Correlated Quantum WiresJan 09 2018We study correlated quantum wires subject to harmonic modulation of the onsite-potential concentrating on the limit of large times, where the response of the system has synchronized with the drive. We identify the ratio $\Delta\epsilon/\Omega$ of the ... More
Wigner function of noninteracting trapped fermionsJan 08 2018We study analytically the Wigner function $W_N({\bf x},{\bf p})$ of $N$ noninteracting fermions trapped in a smooth confining potential $V({\bf x})$ in $d$ dimensions. At zero temperature, $W_N({\bf x},{\bf p})$ is constant over a finite support in the ... More
Out-of-time-ordered correlators in quantum Ising chainJan 05 2018Out-of-time-ordered correlators (OTOC) have been proposed to characterize quantum chaos in generic systems. However, they can also show interesting behavior in integrable models, resembling the OTOC in chaotic systems in some aspects. Here we study the ... More
Charge and spin correlations in the Monopole LiquidJan 02 2018A \emph{monopole liquid} is a magnetic charge-disordered spin system defined over an Ising pyrochlore lattice, with one single topological charge or \emph{monopole} in each tetrahedron. We define a simple model Hamiltonian for this system and compare ... More
Nonequilibrium Steady State of a Weakly-Driven Kardar-Parisi-Zhang EquationDec 29 2017We consider an infinite interface in $d>2$ dimensions, governed by the Kardar-Parisi-Zhang (KPZ) equation with a weak Gaussian noise which is delta-correlated in time and has short-range spatial correlations. We study the probability distribution of the ... More
Suppression of heating in quantum spin clusters under periodic driving as a dynamic localization effectDec 28 2017We investigate numerically and analytically the heating process in ergodic clusters of interacting spins 1/2 subjected to periodic pulses of external magnetic field. Our findings indicate that there is a threshold for the pulse strength below which the ... More
Emergence of Spatial Order in Highly Interacting Rydberg GasesDec 28 2017We describe the emergence of strong spatial correlations, akin to liquid-like behavior and crystallization effects, in low (one and two) dimensional gases of cold Rydberg atoms. The presence of an external electric field permanently polarizes the atoms, ... More
Microfield distribution in plasmasDec 22 2017We calculate stationary distribution of force acting on charged particle in plasma environment with magnetic interaction between particle and moving charges taken into account. Obtained result is a generalization of Holtsmark distribution and coincides ... More
User's guide to Monte Carlo methods for evaluating path integralsDec 22 2017We give an introduction to the calculation of path integrals on a lattice, with the quantum harmonic oscillator as an example. In addition to providing an explicit computational setup and corresponding pseudocode, we pay particular attention to the existence ... More
Unsteady heat conduction processes in a harmonic crystal with a substrate potentialDec 22 2017An analytical model of high frequency oscillations of the kinetic and potential energies in a one-dimensional harmonic crystal with a substrate potential is obtained by introducing the nonlocal energies [1]. A generalization of the kinetic temperature ... More
Structural Covariance in the Hard Sphere FluidDec 22 2017Feb 01 2018We study the joint variability of structural information in a hard sphere fluid biased to avoid crystallisation and form fivefold symmetric geometric motifs. We show that the structural covariance matrix approach, originally proposed for on-lattice liquids ... More
Influence of turbulent mixing on critical behavior of directed percolation process : effect of compressibilityDec 22 2017Universal behavior is a typical emergent feature of critical systems. A paramount model of the non-equilibrium critical behavior is the directed bond percolation process that exhibits an active- to-absorbing state phase transition in the vicinity of a ... More
From the $SU(2)$ Quantum Link Model on the Honeycomb Lattice to the Quantum Dimer Model on the Kagomé Lattice: Phase Transition and Fractionalized Flux StringsDec 22 2017Jan 03 2018We consider the $(2+1)$-d $SU(2)$ quantum link model on the honeycomb lattice and show that it is equivalent to a quantum dimer model on the Kagom\'e lattice. The model has crystalline confined phases with spontaneously broken translation invariance associated ... More
Repulsive Casimir force in Bose-Einstein CondensateDec 21 2017We study the Casimir effect for a three dimensional system of ideal free massive Bose gas in a slab geometry with Zaremba and anti-periodic boundary conditions. It is found that for these type of boundary conditions the resulting Casimir force is repulsive ... More
Disordered $λ\varphi^{4}+ρ\varphi^{6}$ Landau-Ginzburg modelDec 21 2017We discuss a disordered $\lambda\varphi^{4}+\rho\varphi^{6}$ Landau-Ginzburg model defined in a d-dimensional space. First we adopt the standard procedure of averaging the disorder dependent free energy of the model. The dominant contribution to this ... More
The cavity approach for Steiner trees Packing problemsDec 19 2017Jan 11 2018The Belief Propagation approximation, or cavity method, has been recently applied to several combinatorial optimization problems in its zero-temperature implementation, the Max-Sum algorithm. In particular, recent developments to solve the Edge-Disjoint ... More
First passage time for superstatistical Fokker-Planck modelsDec 13 2017The first passage time (FPT) problem is studied for superstatistical models assuming that the mesoscopic system dynamics is described by a Fokker-Planck equation. We show that all moments of the random intensive parameter associated to the superstatistical ... More
Adaptation to criticality through organizational invariance in embodied agentsDec 13 2017Many biological and cognitive systems do not operate deep within one or other regime of activity. Instead, they are poised at critical points located at transitions of their parameter space. The pervasiveness of criticality suggests that there may be ... More
Tracer particle diffusion in a system with hardcore interacting particlesDec 11 2017Dec 13 2017In this study, inspired by the work of K. Nakazato and K. Kitahara [Prog. Theor. Phys. 64, 2261 (1980)], we consider the theoretical problem of tracer particle diffusion in an environment of diffusing hardcore interacting crowder particles. The tracer ... More
Kardar-Parisi-Zhang universality in the phase distributions of one-dimensional exciton-polaritonsDec 11 2017Exciton-polaritons under driven-dissipative conditions exhibit a condensation transition which belongs to a different universality class than equilibrium Bose-Einstein condensates. By numerically solving the generalized Gross-Pitaevskii equation with ... More
Driven-dissipative Bose-Einstein condensation of just a few photonsNov 29 2017Coherence and correlations are defining features of quantum condensates. These condensates are inherently multimode phenomena and in the macroscopic limit it becomes extremely difficult to resolve populations of individual modes and correlations among ... More
Two-dimensional Ising model on random lattices with constant coordination numberNov 21 2017Dec 12 2017We study the two-dimensional Ising model on a network with a novel type of quenched topological (connectivity) disorder. We construct random lattices of constant coordination number and perform large scale Monte Carlo simulations in order to obtain critical ... More