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Gradient descent dynamics in complex energy landscapes, i.e. featuring multiple minima, finds application in many different problems, from soft matter to machine learning. Here, we analyze one of the simplest examples, namely that of soft…

统计力学 · 物理学 2022-08-23 Alessandro Manacorda , Francesco Zamponi

Random packing of unoriented regular polygons and star polygons on a two-dimensional flat, continuous surface is studied numerically using random sequential adsorption algorithm. Obtained results are analyzed to determine saturated random…

统计力学 · 物理学 2016-03-27 Michał Cieśla , Jakub Barbasz

Diffusion in a two-species 2D system has been simulated using a lattice approach. Rodlike particles were considered as linear $k$-mers of two mutually perpendicular orientations ($k_x$- and $k_y$-mers) on a square lattice. These $k_x$- and…

统计力学 · 物理学 2017-09-26 Yuri Yu. Tarasevich , Valeri V. Laptev , Andrei S. Burmistrov , Nikolai I Lebovka

We demonstrate the application of artificial neural network (ANN) models to reverse Monte Carlo based thermodynamic calculations. Adsorption isotherms are generated for 2D square and triangular lattices. These lattices are considered…

统计力学 · 物理学 2023-02-01 Akash Kumar Ball , Swati Rana , Gargi Agrahari , Abhijit Chatterjee

We propose a generalized car parking problem where cars of two different sizes are sequentially parked on a line with a given probability $q$. The free parameter $q$ interpolates between the classical car parking problem of only one car…

统计力学 · 物理学 2009-11-07 M. K. Hassan , J. Schmidt , B. Balsius , J. Kurths

We consider exploration algorithms of the random sequential adsorption type both for homogeneous random graphs and random geometric graphs based on spatial Poisson processes. At each step, a vertex of the graph becomes active and its…

概率论 · 数学 2017-11-22 Paola Bermolen , Matthieu Jonckheere , Jaron Sanders

We give a simple formula for the looping rate of loop-erased random walk on a finite planar graph. The looping rate is closely related to the expected amount of sand in a recurrent sandpile on the graph. The looping rate formula is…

概率论 · 数学 2016-03-28 Adrien Kassel , David B. Wilson

Monte Carlo sampling techniques are used to estimate high-dimensional integrals that model the physics of light transport in virtual scenes for computer graphics applications. These methods rely on the law of large numbers to estimate…

图形学 · 计算机科学 2020-02-18 Alexandros D. Keros , Divakaran Divakaran , Kartic Subr

Reversible jump Markov chain Monte Carlo (RJMCMC) proposals that achieve reasonable acceptance rates and mixing are notoriously difficult to design in most applications. Inspired by recent advances in deep neural network-based normalizing…

统计计算 · 统计学 2023-02-28 Laurence Davies , Robert Salomone , Matthew Sutton , Christopher Drovandi

We study the adsorption and desorption kinetics of interacting particles moving on a one-dimensional lattice. Confinement is introduced by limiting the number of particles on a lattice site. Adsorption and desorption are found to proceed at…

统计力学 · 物理学 2014-12-16 T. Becker , K. Nelissen , B. Cleuren , B. Partoens , C. Van den Broeck

Numerical simulations and finite-size scaling analysis have been carried out to study standard and inverse percolation of straight rigid rods on triangular lattices. In the case of standard (inverse) percolation, the lattice is initially…

统计力学 · 物理学 2021-07-07 L. S. Ramirez , P. M. Pasinetti , W. Lebrecht , A. J. Ramirez-Pastor

We consider the problem of computing an approximation to the integral $I=\int_{[0,1]^d}f(x) dx$. Monte Carlo (MC) sampling typically attains a root mean squared error (RMSE) of $O(n^{-1/2})$ from $n$ independent random function evaluations.…

统计计算 · 统计学 2008-11-05 Art B. Owen

The $k$-core percolation on the Bethe lattice has been proposed as a simple model of the jamming transition because of its hybrid first-order/second-order nature. We investigate numerically $k$-core percolation on the four-dimensional…

无序系统与神经网络 · 物理学 2012-10-31 Giorgio Parisi , Tommaso Rizzo

We consider first-passage percolation on the $d$ dimensional cubic lattice for $d \geq 2$; that is, we assign independently to each edge $e$ a nonnegative random weight $t_e$ with a common distribution and consider the induced random graph…

概率论 · 数学 2016-04-21 Michael Damron , Naoki Kubota

The percolation behavior of aligned rigid rods of length $k$ ($k$-mers) on two-dimensional triangular lattices has been studied by numerical simulations and finite-size scaling analysis. The $k$-mers, containing $k$ identical units (each…

统计力学 · 物理学 2019-11-13 P. Longone , P. M. Centres , A. J. Ramirez-Pastor

The intersecting pedestrian flow on the 2D lattice with random update rule is studied. Each pedestrian has three moving directions without the back step. Under periodic boundary conditions, an intermediate phase has been found at which some…

元胞自动机与格子气 · 物理学 2017-03-06 Zhong-Jun Ding , Shao-Long Yu , Kongjin Zhu , Jian-Xun Ding , Bokui Chen , Qin Shi , Rui Jiang , Bing-Hong Wang

Recently, Approximate Message Passing (AMP) has been integrated with stochastic localization (diffusion model) by providing a computationally efficient estimator of the posterior mean. Existing (rigorous) analysis typically proves the…

统计理论 · 数学 2025-03-18 Han Cui , Zhiyuan Yu , Jingbo Liu

Magnetic and charge susceptibilities in the Kondo lattice are derived by the continuous-time quantum Monte Carlo (CT-QMC) method combined with the dynamical mean-field theory. For a weak exchange coupling J and near half filling of the…

强关联电子 · 物理学 2009-03-18 Junya Otsuki , Hiroaki Kusunose , Yoshio Kuramoto

Using a reference system approach, we develop an analytical theory for the adsorption of random heteropolymers with exponentially decaying and/or oscillating sequence correlations on planar homogeneous surfaces. We obtain a simple equation…

软凝聚态物质 · 物理学 2009-11-11 Alexey Polotsky , Friederike Schmid , Andreas Degenhard

Magneto-Optical Traps have been used for several decades. Among fundamental mechanisms occuring in such traps, the magnitude of the multiple scattering is still unclear. Indeed, many experimental situations cannot be modeled easily,…

原子物理 · 物理学 2014-06-11 Rudy Romain , Hélène Louis , Philippe Verkerk , Daniel Hennequin