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Linear and nonlinear instabilities of Kirchhoff’s elliptical vortices J. Stat. Mech. (IF 2.215) Pub Date : 20200809
Calvin A Fracassi Farias, Renato Pakter and Yan LevinWe investigate the stability of a uniform elliptical vortex in a twodimensional incompressible Euler fluid. It is demonstrated that for small eccentricities, the vortex relaxes to a corehalo structure that undergoes rigid rotation with the central core remaining nearly elliptical. For large eccentricities, the vortex splits into two quasicircular vortices that revolve around the center of mass.

Thermodynamic geometry, transition between attractive and repulsive interactions and condensation of dual statistics J. Stat. Mech. (IF 2.215) Pub Date : 20200806
Zahra Ebadi, Hosein Mohammadzadeh, Ramin Roozehdar Mogaddam and Mehdi AmiriWe consider new generalized statistics based on the generalization of statistical weight. We work out the thermodynamic curvature of an ideal gas with particles obeying such generalized statistics. For different values of generalization parameters; p and q , we observe that both attractive and repulsive intrinsic statistical interaction is expected. As long as p ⩾ q , the thermodynamic curvature is

Erratum: Noiseinduced transition in human reaction times (2016 J. Stat. Mech.: Theory Exp. 9 [http://doi.org/10.1088/17425468/2016/09/093502] 093502 ) J. Stat. Mech. (IF 2.215) Pub Date : 20200806
José M Medina and José A DíazDescription unavailable

Kinetics of firstorder phase transitions from microcanonical thermostatistics J. Stat. Mech. (IF 2.215) Pub Date : 20200805
L G RizziMore than a century has passed since van’t Hoff and Arrhenius formulated their celebrated rate theories, but there are still elusive aspects in the temperaturedependent phase transition kinetics of molecular systems. Here I present a theory based on microcanonical thermostatistics that establishes a simple and direct temperature dependence for all rate constants, including the forward and the reverse

Critical analysis of twodimensional classical XY model J. Stat. Mech. (IF 2.215) Pub Date : 20200805
Raghav G JhaWe consider the twodimensional classical XY model on a square lattice in the thermodynamic limit using tensor renormalization group and precisely determine the critical temperature corresponding to the Berezinskii–Kosterlitz–Thouless (BKT) phase transition to be 0.89290(5) which is an improvement compared to earlier studies using tensor network methods.

Revisiting Lévy flights on bounded domains: a Fock space approach J. Stat. Mech. (IF 2.215) Pub Date : 20200804
H A Araújo, M O Lukin, M G E da Luz, G M Viswanathan, F A N Santos and E P RaposoThe statistical description of a onedimensional superdiffusive Lévy flier restricted to a finite domain is well known to be technically involving. For example, in this type of process the probability distribution P ( x , t ) and survival probability S ( t ) cannot be obtained from the method of images. Other methods, such as the fractional derivative approach, also find technical difficulties due

Two dimensional soliton in tumor induced angiogenesis J. Stat. Mech. (IF 2.215) Pub Date : 20200804
L L Bonilla, M Carretero and F TerragniEnsemble averages of a stochastic model show that, after a formation stage, the tips of active blood vessels in an angiogenic network form a moving two dimensional stable diffusive soliton, which advances toward sources of growth factor. Here we use methods of multiple scales to find the diffusive soliton as a solution of a deterministic equation for the mean density of active endothelial cells tips

Numerical identification and gapped boundaries of Abelian fermionic topological order J. Stat. Mech. (IF 2.215) Pub Date : 20200803
Nick BultinckIn this work we consider general fermion systems in two spatial dimensions, both with and without charge conservation symmetry, which realize a nontrivial fermionic topological order with only Abelian anyons. We address the question of precisely how these quantum phases differ from their bosonic counterparts, both in terms of their edge physics and in the way one would identify them in numerics. As

A Pfaffian formula for the Ising partition function of surface graphs J. Stat. Mech. (IF 2.215) Pub Date : 20200803
Anh Minh PhamWe give a Pfaffian formula to compute the partition function of the Ising model on any graph G embedded in a closed, possibly nonorientable surface. This formula can be considered as an extension of the generalised Kac–Ward formula in Cimasoni (2010 J. Stat. Mech. P07023) to the case of nonorientable surfaces. By combining the ideas of Loebl–Masbaum (2011 Adv. Math. 226 332–49), Tesler (2000 J. Comb

Entanglement Hamiltonian of the 1 + 1dimensional free, compactified boson conformal field theory J. Stat. Mech. (IF 2.215) Pub Date : 20200803
Ananda Roy, Frank Pollmann and Hubert SaleurEntanglement or modular Hamiltonians play a crucial role in the investigation of correlations in quantum field theories. In particular, in 1 + 1 space–time dimensions, the spectra of entanglement Hamiltonians of conformal field theories (CFTs) for certain geometries are related to the spectra of the physical Hamiltonians of corresponding boundary CFTs. As a result, conformal invariance allows exact

Investigation of attractive interactions in a selfdriven unidirectional twochannel model with periodic and open boundaries J. Stat. Mech. (IF 2.215) Pub Date : 20200803
QingYi Hao, Rui Jiang, MaoBin Hu, ChaoYun Wu, Hai Zhang, BingBing Liu and Ning GuoThe totally asymmetric exclusion process (TASEP) is an outstanding paradigm of selfdriven particle models. A new twochannel TASEP model with shortrange interactions in horizontal and vertical directions is given. The dynamic properties of the system with periodic boundary and open boundary are investigated by computer simulation and theoretical analysis. The analysis results based on the cluster

Correlation functions of charged free boson and fermion systems J. Stat. Mech. (IF 2.215) Pub Date : 20200802
Naihuan Jing, Zhijun Li and Tommy Wuxing CaiUsing the idea of the quantum inverse scattering method, we introduce the operators B ( x ), C ( x ) and ##IMG## [http://ej.iop.org/images/17425468/2020/8/083101/jstataba0aaieqn1.gif] {$\tilde {\mathbf{B}}\left(x\right),\tilde {\mathbf{C}}\left(x\right)$} corresponding to the offdiagonal entries of the monodromy matrix T for the phase model and i boson model in terms of bc fermions and neutral fermions

Reappraising the distribution of the number of edge crossings of graphs on a sphere J. Stat. Mech. (IF 2.215) Pub Date : 20200802
Lluís AlemanyPuig, Mercè Mora and Ramon FerreriCanchoMany real transportation and mobility networks have their vertices placed on the surface of the Earth. In such embeddings, the edges laid on that surface may cross. In his pioneering research, Moon analyzed the distribution of the number of crossings on complete graphs and complete bipartite graphs whose vertices are located uniformly at random on the surface of a sphere assuming that vertex placements

Orientational probability distribution of an active Brownian particle: an analytical study J. Stat. Mech. (IF 2.215) Pub Date : 20200802
Supurna SinhaWe use the Fokker–Planck equation as a starting point for studying the orientational probability distribution of an active Brownian particle (ABP) in ( d + 1) dimensions (i.e. d angular dimensions and 1 radial dimension). This Fokker–Planck equation admits an exact solution in series form which is, however, unwieldy to use because of poor convergence for short and intermediate times. We present an

Construction of manybodylocalized models where all the eigenstates are matrixproductstates J. Stat. Mech. (IF 2.215) Pub Date : 20200802
Cécile MonthusThe inverse problem of ‘eigenstatestoHamiltonian’ is considered for an open chain of N quantum spins in the context of manybodylocalization. We first construct the simplest basis of the Hilbert space made of 2 N orthonormal matrixproductstates (MPS), that will thus automatically satisfy the entanglement arealaw. We then analyze the corresponding N local integrals of motions (LIOMs) that can

Symmetry resolved entanglement in twodimensional systems via dimensional reduction J. Stat. Mech. (IF 2.215) Pub Date : 20200802
Sara Murciano, Paola Ruggiero and Pasquale CalabreseWe report on the calculation of the symmetry resolved entanglement entropies in twodimensional manybody systems of free bosons and fermions by dimensional reduction . When the subsystem is translational invariant in a transverse direction, this strategy allows us to reduce the initial twodimensional problem into decoupled onedimensional ones in a mixed spacemomentum representation. While the idea

Lowtemperature asymptotic of the transverse dynamical structure factor for a magnetically polarized XX chain J. Stat. Mech. (IF 2.215) Pub Date : 20200730
P N BibikovThe Dyson equation for the real twotime commutator retarded onemagnon Green function of the ferromagnetically polarized XX chain is suggested following the Plakida–Tserkovnikov algorithm. Starting from this result a lowtemperature integral representation for the corresponding magnon selfenergy is obtained by the truncated form factor expansion, however, without any resummations. Within the suggested

Quantum clock models with infiniterange interactions J. Stat. Mech. (IF 2.215) Pub Date : 20200730
Adu OffeiDanso, Federica Maria Surace, Fernando Iemini, Angelo Russomanno and Rosario FazioWe study the phase diagram, both at zero and finite temperature, in a class of ##IMG## [http://ej.iop.org/images/17425468/2020/7/073107/jstataba0a1ieqn1.gif] {${\mathbb{Z}}_{q}$} models with infiniterange interactions. We are able to identify the transitions between a symmetrybreaking and a trivial phase by using a meanfield approach and a perturbative expansion. We perform our analysis on a Hamiltonian

Characterization for entropy of shifts of finite type on Cayley trees J. Stat. Mech. (IF 2.215) Pub Date : 20200730
JungChao Ban and ChihHung ChangThe notion of treeshifts constitutes an intermediate class between onesided shift spaces and multidimensional ones. This paper proposes an algorithm for computing the entropy of a treeshift of finite type. Meanwhile, the entropy of a treeshift of finite type is ##IMG## [http://ej.iop.org/images/17425468/2020/7/073412/jstataba0a0ieqn1.gif] {$\frac{1}{p} \mathrm{ln} \lambda $} for some ##IMG## [http://ej

Permutation matrix representation quantum Monte Carlo J. Stat. Mech. (IF 2.215) Pub Date : 20200727
Lalit Gupta, Tameem Albash and Itay HenWe present a quantum Monte Carlo algorithm for the simulation of general quantum and classical manybody models within a single unifying framework. The algorithm builds on a power series expansion of the quantum partition function in its offdiagonal terms and is both parameterfree and Trotter errorfree. In our approach, the quantum dimension consists of products of elements of a permutation group

The cavity master equation: average and fixed point of the ferromagnetic model in random graphs J. Stat. Mech. (IF 2.215) Pub Date : 20200727
E Domínguez, D Machado and R MuletThe cavity master equation (CME) is a closure scheme to the usual master equation representing the dynamics of discrete variables in continuous time. In this work we explore the CME for a ferromagnetic model in a random graph. We first derive and average equation of the CME that describes the dynamics of mean magnetization of the system. We show that the numerical results compare remarkably well with

Conformational transitions of a DNA hairpin through transition path times J. Stat. Mech. (IF 2.215) Pub Date : 20200727
Shivangi Sharma and Parbati BiswasThe stochastic dynamics of zipping/unzipping transition of a DNA hairpin is theoretically investigated within the framework of generalized Langevin equation in a complex cellular environment. Analytical expressions of the distributions of transition path and first passage times are derived. The results reveal that the transition path time of DNA is shorter compared to the Kramers’s first passage time

Experimental study of luggageladen pedestrian flow in walking and running conditions J. Stat. Mech. (IF 2.215) Pub Date : 20200721
Zhigang Shi, Jun Zhang, Weiguo Song, Xiangxia Ren and Ma WeibinLuggageladen pedestrians are important traffic elements especially in public places such as railway stations, airports etc. In this study, experiments were performed with luggageladen pedestrians walking and running to understand the properties of their movement including the way they carry luggage, their speed and their spatial distribution. It is found that their gender, position and speed all

Clustering of solutions in the symmetric binary perceptron J. Stat. Mech. (IF 2.215) Pub Date : 20200720
Carlo Baldassi, Riccardo Della Vecchia, Carlo Lucibello and Riccardo ZecchinaThe geometrical features of the (nonconvex) loss landscape of neural network models are crucial in ensuring successful optimization and, most importantly, the capability to generalize well. While minimizers’ flatness consistently correlates with good generalization, there has been little rigorous work in exploring the condition of existence of such minimizers, even in toy models. Here we consider

Learning to find order in disorder J. Stat. Mech. (IF 2.215) Pub Date : 20200720
Humberto MunozBauza, Firas Hamze and Helmut G KatzgraberWe introduce the use of neural networks as classifiers on classical disordered systems with no spatial ordering. In this study, we propose a framework of design objectives for learning tasks on disordered systems. Based on our framework, we implement a convolutional neural network trained to identify the spinglass state in the threedimensional Edwards–Anderson Ising spinglass model from an input

Unstable periodic orbits analysis in the generalized Lorenztype system J. Stat. Mech. (IF 2.215) Pub Date : 20200720
Chengwei Dong, Huihui Liu and Hantao LiIn this paper, we investigated the unstable periodic orbits of a nonlinear chaotic generalized Lorenztype system. By means of the variational method, appropriate symbolic dynamics are put forward, and the homotopy evolution approach, which can be used in the initialization of the cycle search, is introduced. Fourteen short unstable periodic orbits with different topological lengths, under specific

Thermalization in parametrically driven coupled oscillators J. Stat. Mech. (IF 2.215) Pub Date : 20200719
Sayak Biswas and S SinhaWe consider a system of two coupled oscillators one of which is driven parametrically and investigate both classical and quantum dynamics within Floquet description. Characteristic changes in the time evolution of the quantum fluctuations are observed for dynamically stable and unstable regions. Dynamical instability generated by the parametrically driven oscillator leads to infinite temperature thermalization

Scaling equations for modecoupling theories with multiple decay channels J. Stat. Mech. (IF 2.215) Pub Date : 20200716
Gerhard Jung, Thomas Voigtmann and Thomas FranoschMultiple relaxation channels often arise in the dynamics of liquids where the momentum current associated to the particleconservation law splits into distinct contributions. Examples are strongly confined liquids for which the currents in lateral and longitudinal direction to the walls are very different, or fluids of nonspherical particles with distinct relaxation patterns for translational and rotational

On the statistical mechanics investigation of structure and effective electrostatic force between two solid surfaces in electrolyte dissolved in nonpolar solvent J. Stat. Mech. (IF 2.215) Pub Date : 20200715
S ZhouOne threesite nonrigid model with two polar covalent bonds is proposed for electrolyte solvent; this model is integrated into the inhomogeneous electrolyte fluid classical density functional theory (CDFT) framework by means of the modified interfacial statistical association fluid theory. With the CDFT, we investigate surface electrostatic force (SEF) between two similarly charged planar surface

Thermodynamic cost of synchronizing a population of beating cilia J. Stat. Mech. (IF 2.215) Pub Date : 20200715
Hyunsuk Hong, Junghyo Jo, Changbong Hyeon and Hyunggyu ParkSynchronization among arrays of beating cilia is one of the emergent phenomena in biological processes at mesoscopic scales. Strong interciliary couplings modify the natural beating frequencies, ω , of individual cilia to produce a collective motion that moves around a group frequency ω m . Here we study the thermodynamic cost of synchronizing cilia arrays by mapping their dynamics onto a generic

Zerocurrent nonequilibrium state in symmetric exclusion process with dichotomous stochastic resetting J. Stat. Mech. (IF 2.215) Pub Date : 20200714
Onkar Sadekar and Urna BasuWe study the dynamics of symmetric exclusion process (SEP) in the presence of stochastic resetting to two possible specific configurations—with rate r 1 (respectively, r 2 ) the system is reset to a steplike configuration where all the particles are clustered in the left (respectively, right) half of the system. We show that this dichotomous resetting leads to a range of rich behaviour, both dynamical

Fermi–Hubbard model on nonbipartite lattices: flux problem and emergent chirality J. Stat. Mech. (IF 2.215) Pub Date : 20200714
Wayne ZhengOn several onedimensional (1D) and 2D nonbipartite lattices, we study both free and Hubbard interacting lattice fermions when some magnetic fluxes are threaded or gauge fields coupled. First, we focus on finding out the optimal flux which minimizes the energy of fermions at specific fillings. For spin1/2 fermions at halffilling on a ring lattice consisting of oddnumbered sites, the optimal flux

Where should you park your car? The ##IMG## [http://ej.iop.org/images/17425468/2020/7/073404/toc_jstatab96b7ieqn1.gif] {$\frac{1}{2}$} rule J. Stat. Mech. (IF 2.215) Pub Date : 20200713
P L Krapivsky and S RednerWe investigate parking in a onedimensional lot, where cars enter at a rate λ and each attempts to park close to a target at the origin. Parked cars also depart at rate 1. An entering driver cannot see beyond the parked cars for more desirable open spots. We analyze a class of strategies in which a driver ignores open spots beyond τL , where τ is a risk threshold and L is the location of the most distant

The transient case of the quenched trap model J. Stat. Mech. (IF 2.215) Pub Date : 20200713
Stanislav BurovIn this work the anomalous diffusion in the quenched trap model with diverging mean waiting times is examined. The approach of randomly stopped time is extensively applied in order to obtain asymptotically exact representation of the disorder averaged positional probability density function. We establish that the dimensionality and the geometric properties of the lattice, on top of which the disorder

Experimental study of singlefile pedestrian movement with height constraints J. Stat. Mech. (IF 2.215) Pub Date : 20200713
Jian Ma, Dongdong Shi, Tao Li, Xiaofei Li, Tengfei Xu and Peng LinIn the case of a fire, the presence of smoke sometimes makes people bend over and thus prevents them from walking upright. This feature of pedestrian movement in this situation is different from normal walking and affects the dynamics of an evacuation. However, the effect of such kind of motion on pedestrian traffic has not been systematically studied. Therefore, this paper studies the characteristics

Multiscale invariant fields: estimation and prediction J. Stat. Mech. (IF 2.215) Pub Date : 20200713
H Ghasemi, S Rezakhah and N ModarresiExtending the concept of multiselfsimilar random field, we study multiscale invariant (MSI) fields with componentwise discrete scale invariant properties. Assuming scale parameters as λ i > 1, i = 1, …, d and the parameter space as (1, ∞) d , the first scale rectangle is referred to the rectangle (1, λ 1 ) ×⋯× (1, λ d ). We show that the covariance functions of the sampled Markov MSI field are characterized

Shot noise multifractal model for turbulent pseudodissipation J. Stat. Mech. (IF 2.215) Pub Date : 20200713
Gabriel B Apolinário and Luca MoriconiMultiplicative cascades have been used in turbulence to generate fields with multifractal statistics and longrange correlations. Examples of continuous and causal stochastic processes which generate such a random field have been carefully discussed in the literature. Here a causal lognormal stochastic process is built to represent the dynamics of pseudodissipation in a Lagrangian trajectory. It is

Invasion sandpile model J. Stat. Mech. (IF 2.215) Pub Date : 20200708
M N Najafi, Z Moghaddam, M Samadpour and Nuno A M AraújoMotivated by multiphase flow in reservoirs, we propose and study a twospecies sandpile model in two dimensions. A pile of particles becomes unstable and topples if, at least one of the following two conditions is fulfilled: (1) the number of particles of one species in the pile exceeds a given threshold or (2) the total number of particles in the pile exceeds a second threshold. The latter mechanism

Extended equipartition in a mechanical system subject to a heat flow: the case of localised dissipation J. Stat. Mech. (IF 2.215) Pub Date : 20200708
Alex Fontana, Richard Pedurand and Ludovic BellonStatistical physics in equilibrium grants us one of its most powerful tools: the equipartition principle. It states that the degrees of freedom of a mechanical system act as a thermometer: temperature is equal to the mean variance of their oscillations divided by their stiffness. However, when a nonequilibrium state is considered, this principle is no longer valid. In our experiment, we study the

Exact microcanonical statistical analysis of transition behavior in Ising chains and strips J. Stat. Mech. (IF 2.215) Pub Date : 20200706
K Sitarachu, R K P Zia and M BachmannRecent analyses of leastsensitive inflection points in derivatives of the microcanonical entropy for the twodimensional Ising model revealed higherorder transition signals in addition to the wellstudied secondorder ferromagnetic/paramagnetic phase transition. In this paper, we reanalyze the exact density of states for the onedimensional Ising chain as well as the strips with widths/lengths of

From prelife to life: a bioinspired toy model J. Stat. Mech. (IF 2.215) Pub Date : 20200706
H J HilhorstWe study a onedimensional lattice of N sites each occupied by a mathematical 'polymer,' that is, is a binary random sequence of arbitrary length n , or equivalently, a rooted path of n links on an infinite binary tree. The average polymer length is controlled by the monomer fugacity z . A pair of polymers on adjacent sites carries a weight factor ω for each link on the tree that they have in common

Competing synchronization on random networks J. Stat. Mech. (IF 2.215) Pub Date : 20200706
Jinha Park and B KahngThe synchronization pattern of a fully connected competing Kuramoto model with a uniform intrinsic frequency distribution g ( ω ) was recently considered. This competing Kuramoto model assigns two coupling constants with opposite signs, K 1 < 0 and K 2 > 0, to the 1 − p and p fractions of nodes, respectively. This model has a rich phase diagram that includes incoherent, π, and travelling wave (TW)

Group rewarding can promote cooperation and save costs in public goods games J. Stat. Mech. (IF 2.215) Pub Date : 20200706
Qiao Chen and Tong ChenPromoting cooperation in public goods games is a longstanding problem in multiple branches of science. Reward is an effective means of promoting cooperation, but can be costly if distributed on a large scale or over long periods of time. Avoiding excessive costs is naturally of critical concern. We introduce group rewarding into public goods games and explore the impacts of such rewarding on cooperation

Symmetry resolved entanglement entropy of excited states in a CFT J. Stat. Mech. (IF 2.215) Pub Date : 20200705
Luca Capizzi, Paola Ruggiero and Pasquale CalabreseWe report a throughout analysis of the entanglement entropies related to different symmetry sectors in the lowlying primary excited states of a conformal field theory (CFT) with an internal U (1) symmetry. Our findings extend recent results for the ground state. We derive a general expression for the charged moments, i.e. the generalised cumulant generating function, which can be written in terms

Learning performance in inverse Ising problems with sparse teacher couplings J. Stat. Mech. (IF 2.215) Pub Date : 20200705
Alia Abbara, Yoshiyuki Kabashima, Tomoyuki Obuchi and Yingying XuWe investigate the learning performance of the pseudolikelihood maximization method for inverse Ising problems. In the teacher–student scenario under the assumption that the teacher’s couplings are sparse and the student does not know the graphical structure, the learning curve and order parameters are assessed in the typical case using the replica and cavity methods from statistical mechanics. Our

NonLandau quantum phase transitions and nearlymarginal nonFermi liquid J. Stat. Mech. (IF 2.215) Pub Date : 20200702
Yichen Xu, Hao Geng, XiaoChuan Wu, ChaoMing Jian and Cenke XuNonFermi liquid and unconventional quantum critical points (QCP) with strong fractionalization are two exceptional phenomena beyond the classic condensed matter doctrines, both of which could occur in strongly interacting quantum manybody systems. This work demonstrates that using a controlled method one can construct a nonFermi liquid within a considerable energy window based on the unique physics

Community detection via a triangle and edge combination conductance partitioning J. Stat. Mech. (IF 2.215) Pub Date : 20200702
Teng Zhang, Lizhu Sun and Changjiang BuIn this paper, we focus on the problem of community detection by normalizedcut graph partitioning. The standard normalizedcut graph partitioning is to partition a graph into subgraphs by removing fewer edges and guaranteeing the number of vertices in subgraphs remains relatively balanced. However, the multiple nature of many networks cannot be captured only by binary edges. In order to detect the

Multivariate correlation analysis of agricultural futures and spot markets based on multifractal statistical methods J. Stat. Mech. (IF 2.215) Pub Date : 20200702
HongYong Wang and YouShuai FengAgricultural commodity futures are the earliest listed futures in the world. The rapid development of their markets has greatly affected the world agricultural production and circulation. Thereby, the volatility characteristics of agricultural futures markets and the crosscorrelations between the futures and spot markets have attracted extensive attention from investors, regulators and researchers

Characteristics of pedestrian flow based on an improved leasteffort model considering body rotation J. Stat. Mech. (IF 2.215) Pub Date : 20200702
Ning Guo, ZhongJun Ding, KongJin Zhu and JianXun DingBody rotation is a common behavior in pedestrian flow dynamics. In this paper, an improved leasteffort model is proposed to reproduce this behavior and other pedestrian flow characteristics. In this model, the pedestrian chooses the velocity and angle of body rotation according to the minimum energy cost. The energy cost includes the caloric expenditure in the walking, collision loss and body rotation

Tuning the tricritical points of percolation transitions in random networks J. Stat. Mech. (IF 2.215) Pub Date : 20200702
Xiao Jia, HongChun Yang, Chun Yang and Tian ZhangPercolation transition in networks as edges are gradually added, can generate a variety of critical and supercritical behaviors. Here we report a percolation transition model with two parameters α and β , in which by decreasing the value of α from 1 to 0 the phase transition could change from continuous to multiple discontinuous and finally to discontinuous without supercritical region, and that the

Distribution with a simple Laplace transform and its applications to nonPoissonian stochastic processes J. Stat. Mech. (IF 2.215) Pub Date : 20200701
Mauro BolognaIn this paper, we propose a novel probability distribution that asymptotically represents a powerlaw, ψ ( t ) ∼ t − α −1 , with 0 < α < 2. The main feature of the distribution is that it has a simple expression in the Laplace transform representation, making it suitable for performing calculations in stochastic processes, particularly nonPoissonian processes.

Metastability in the Potts model: exact results in the large q limit J. Stat. Mech. (IF 2.215) Pub Date : 20200701
Onofrio Mazzarisi, Federico Corberi, Leticia F Cugliandolo and Marco PiccoWe study the metastable equilibrium properties of the twodimensional Potts model with heatbath transition rates using a novel expansion. The method is especially powerful for large number of state spin variables and it is notably accurate in a rather wide range of temperatures around the phase transition.

Information geometry in the population dynamics of bacteria J. Stat. Mech. (IF 2.215) Pub Date : 20200701
Zihan Zhang, Shaohua Guan and Hualin ShiIn recent years, researchers have delved into the relationship between information and stochastic thermodynamics. In this paper, we apply the information geometry to discover the physical limitation in bacterial growth. By mapping the evolution of distribution to the motion on the hypersphere, we discover a relationship between evolutionary time and cost in the bacterial growth process. Through the

Bootstrap and diffusion percolation transitions in threedimensional lattices J. Stat. Mech. (IF 2.215) Pub Date : 20200624
JeongOk Choi and Unjong YuWe study the bootstrap and diffusion percolation models in the simplecubic (sc), bodycentered cubic (bcc), and facecentered cubic (fcc) lattices using the Newman–Ziff algorithm. The percolation threshold and critical exponents were calculated through finitesize scaling with high precision in the three lattices. In addition to the continuous and firstorder percolation transitions, we found a double

Nonlinear entanglement witnesses for four qubits in mutually unbiased bases J. Stat. Mech. (IF 2.215) Pub Date : 20200624
K Aghayar, A Heshmati and M A JafarizadehEntanglement witness is a Hermitian operator that is useful for detecting the genuine multipartite entanglement of mixed states. Nonlinear entanglement witnesses have the advantage of a wider detection range in the entangled region. We construct genuine entanglement witnesses for four qubits density matrices in the mutually unbiased basis. First, we find the convex feasible region with positive partial

Phase transition in a 1D driven tracer model J. Stat. Mech. (IF 2.215) Pub Date : 20200624
Asaf Miron, David Mukamel and Harald A PoschThe effect of particle overtaking on transport in a narrow channel is studied using a 1D model of a driven tracer in a quiescent bath. In contrast with the wellstudied nondriven case, where the tracer’s longtime dynamics changes from subdiffusive to diffusive whenever overtaking is allowed, the driven tracer is shown to exhibit a phase transition at a finite overtaking rate. The transition separates

Onedimensional Janus fluids. Exact solution and mapping from the quenched to the annealed system J. Stat. Mech. (IF 2.215) Pub Date : 20200624
M A G Maestre and A SantosThe equilibrium properties of a Janus fluid confined to a onedimensional channel are exactly derived. The fluid is made of particles with two faces (active and passive), so that the pair interaction is that of hard spheres, except if the two active faces are in front of each other, in which case the interaction has a squarewell attractive tail. Our exact solution refers to quenched systems (i.e.

Thermal Kosterlitz–Thouless transitions in the 1/ r 2 longrange ferromagnetic quantum Ising chain revisited J. Stat. Mech. (IF 2.215) Pub Date : 20200624
Stephan HumeniukFor the inverse square longrange ferromagnetic Ising chain in a transverse field, the thermal phase boundary of the floating Kosterlitz–Thouless phase is obtained for several values of the transverse field down to the quantum critical point. The sharp domain walls in the classical model are increasingly smeared out by the transverse field, which is evidenced by a pronounced broadening of the nonuniversal

Quantum thermalization and Virasoro symmetry J. Stat. Mech. (IF 2.215) Pub Date : 20200624
Mert Beşken, Shouvik Datta and Per KrausWe initiate a systematic study of high energy matrix elements of local operators in 2D CFT. Knowledge of these is required in order to determine whether the generalized eigenstate thermalization hypothesis (ETH) can hold in such theories. Most high energy states are high level Virasoro descendants, and by employing an oscillator representation of the Virasoro algebra we develop an efficient method

Noisy voter model for the anomalous diffusion of parliamentary presence J. Stat. Mech. (IF 2.215) Pub Date : 20200624
A KononoviciusWe examine the parliamentary presence data of the 2008–2012 and 2012–2016 legislatures of the Lithuanian parliament. We consider the cumulative presence series of each individual representative in the data set. These series exhibit superdiffusive behavior. We propose a modified noisy voter model as a model for the parliamentary presence. We provide detailed analysis of the anomalous diffusion of the