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We study the McKean--Vlasov equation on the finite tori of length scale $L$ in $d$--dimensions. We derive the necessary and sufficient conditions for the existence of a phase transition, which are based on the criteria first uncovered in…

数学物理 · 物理学 2015-05-14 Lincoln Chayes , Vladislav Panferov

We study the two-dimensional contact process (CP) with quenched disorder (DCP), and determine the static critical exponents beta and nu_perp. The dynamic behavior is incompatible with scaling, as applied to models (such as the pure CP) that…

统计力学 · 物理学 2009-10-30 Ronald Dickman , Adriana G. Moreira

Consider the following stochastic model for immune response. Each pathogen gives birth to a new pathogen at rate $\lambda$. When a new pathogen is born, it has the same type as its parent with probability $1 - r$. With probability $r$, a…

概率论 · 数学 2007-05-23 Thomas M. Liggett , Rinaldo B. Schinazi , Jason Schweinsberg

We instigate the properties of the threshold contact process (TCP), a process showing an absorbing-state phase transition with infinitely many absorbing states, on random complex networks. The finite size scaling exponents characterizing…

统计力学 · 物理学 2015-06-11 Renan S. Sander , Silvio C. Ferreira , Romualdo Pastor-Satorras

In this paper, we investigate the asymptotic behaviors of the survival probability and maximal displacement of a subcritical branching killed L\'{e}vy process $X$ in $\mathbb{R}$. Let $\zeta$ denote the extinction time, $M_t$ be the maximal…

概率论 · 数学 2025-10-21 Yan-Xia Ren , Renming Song , Yaping Zhu

We consider the d-dimensional massless free field localized by a delta-pinning of strength e. We study the asymptotics of the variance of the field, and of the decay-rate of its 2-point function, as e goes to zero, for general Gaussian…

概率论 · 数学 2009-10-31 Erwin Bolthausen , Yvan Velenik

While $CP$ violation has never been observed in the strong interactions, the QCD Lagrangian admits a $CP$-odd topological interaction proportional to the so called $\theta$ angle, which weighs the contributions to the partition function…

高能物理 - 理论 · 物理学 2022-09-19 Wen-Yuan Ai , Juan S. Cruz , Bjorn Garbrecht , Carlos Tamarit

We study the nonequilibrium phase transition in the two-dimensional contact process on a randomly diluted lattice by means of large-scale Monte-Carlo simulations for times up to $10^{10}$ and system sizes up to $8000 \times 8000$ sites. Our…

无序系统与神经网络 · 物理学 2009-01-13 Thomas Vojta , Adam Farquhar , Jason Mast

In this paper we investigate the scaling limit of the range (the set of visited vertices) for a class of critical lattice models, starting from a single initial particle at the origin. We give conditions on the random sets and an associated…

概率论 · 数学 2018-06-25 Mark Holmes , Edwin Perkins

We consider symmetric activated random walks on $\mathbb{Z}$, and show that the critical density $\zeta_c$ satisfies $c\sqrt{\lambda} \leq \zeta_c(\lambda) \leq C \sqrt{\lambda}$ where $\lambda$ denotes the sleep rate.

概率论 · 数学 2019-07-31 Amine Asselah , Leonardo T. Rolla , Bruno Schapira

We study invariant measures of continuous contact model in small dimensional spaces ($d =1,2$). Under general conditions we prove that in the critical regime this system has the one-parameter set of invariant measures parametrized by the…

数学物理 · 物理学 2019-11-06 Yuri Kondratiev , Oleksandr Kutoviy , Sergey Pirogov , Elena Zhizhina

We study the late time exponential decay of the survival probability $S_\pm(t,a|x_0)\sim e^{-\theta(a)t}$, of a one-dimensional run and tumble particle starting from $x_0<a$ with an initial orientation $\sigma(0)=\pm 1$, under a confining…

统计力学 · 物理学 2025-03-13 Sujit Kumar Nath , Sanjib Sabhapandit

We investigate the percolative properties of the vacant set left by random interlacements on Z^d, when d is large. A non-negative parameter u controls the density of random interlacements on Z^d. It is known from arXiv:0704.2560, and…

概率论 · 数学 2011-09-01 Alain-Sol Sznitman

In this paper we investigate the survival probability, \theta_n, in high-dimensional statistical physical models, where \theta_n denotes the probability that the model survives up to time n. We prove that if the r-point functions scale to…

概率论 · 数学 2011-10-05 Remco van der Hofstad , Mark Holmes

In long-range percolation on $\mathbb{Z}^d$, points $x$ and $y$ are connected by an edge with probability $1-\exp(-\beta\|x-y\|^{-d-\alpha})$, where $\alpha>0$ is fixed and $\beta \geq 0$ is a parameter. As $d$ and $\alpha$ vary, the model…

概率论 · 数学 2025-08-27 Tom Hutchcroft

The critical behaviour of semi-infinite $d$-dimensional systems with short-range interactions and an O(n) invariant Hamiltonian is investigated at an $m$-axial Lifshitz point with an isotropic wave-vector instability in an $m$-dimensional…

统计力学 · 物理学 2008-11-26 H. W. Diehl , S. Rutkevich , A. Gerwinski

The purpose of this article is to study some asymptotic properties of the \Lambda-Wright-Fisher process with selection. This process represents the frequency of a disadvantaged allele. The resampling mechanism is governed by a finite…

概率论 · 数学 2014-03-06 Clement Foucart

We study survival and extinction of a long-range infection process on a diluted one-dimensional lattice in discrete time. The infection can spread to distant vertices according to a Pareto distribution, however spreading is also prohibited…

概率论 · 数学 2023-10-19 Benedikt Jahnel , Anh Duc Vu

We prove a large deviations principle for the empirical measure of the one dimensional symmetric simple exclusion process in contact with reservoirs. The dynamics of the reservoirs is slowed down with respect to the dynamics of the system,…

概率论 · 数学 2021-07-16 Tertuliano Franco , Patrícia Gonçalves , Adriana Neumann

Critical exponents have been obtained for a 3D spin particle system. Clusters are formed and system reaches a critical behavior when fragment size distribution follows a power law, as predicted by Fisher Liquid Droplet Model. Also,…

凝聚态物理 · 物理学 2007-05-23 A. Barrañón , J. A. López , C. Dorso , Fr. de L. Castillo