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We develop an Euler-type particle method for the simulation of a McKean--Vlasov equation arising from a mean-field model with positive feedback from hitting a boundary. Under assumptions on the parameters which ensure differentiable…

数值分析 · 数学 2018-05-31 Vadim Kaushansky , Christoph Reisinger

Correlation functions and correlation lengths are frequently used to describe phase transitions in quantum systems, but they require an explicit choice of observables. The recently introduced information lattice instead provides an…

强关联电子 · 物理学 2026-05-01 William Skoglund , Elton Giacomelli , Yiqi Yang , Jens H. Bardarson , Erik van Loon

We fill a void in merging empirical and phenomenological characterisation of the dynamical phase transitions in complex systems by identifying three of them on real-life financial markets. We extract and interpret the empirical, numerical,…

统计金融 · 定量金融 2014-02-19 M. Wilinski , B. Szewczak , T. Gubiec , R. Kutner , Z. R. Struzik

Simulations show that sliding bilayers of colloidal particles can exhibit a new phase, the ``melt-freeze'' phase, where the layers stochastically alternate between solidlike and liquidlike states. We introduce a mean field phenomenological…

软凝聚态物质 · 物理学 2009-11-11 Trieu Mai

This study numerically investigates the nonlinear interaction of head-on solitary waves in a granular chain (a nonintegrable system) and compares the simulation results with the theoretical results in fluid (an integrable system). Three…

软凝聚态物质 · 物理学 2023-10-31 Shutian Zhang , Shikun Liu , Tengfei Jiao , Min Sun , Decai Huang

Consider a two-class clustering problem where we observe $X_i = \ell_i \mu + Z_i$, $Z_i \stackrel{iid}{\sim} N(0, I_p)$, $1 \leq i \leq n$. The feature vector $\mu\in R^p$ is unknown but is presumably sparse. The class labels…

统计理论 · 数学 2016-06-09 Jiashun Jin , Zheng Tracy Ke , Wanjie Wang

Transition out of a topological phase is typically characterized by discontinuous changes in topological invariants along with bulk gap closings. However, as a clean system is geometrically punctured, it is natural to ask the fate of an…

无序系统与神经网络 · 物理学 2023-12-15 Saikat Mondal , Subrata Pachhal , Adhip Agarwala

This paper summarises a numerical investigation of phase mixing in time-independent Hamiltonian systems that admit a coexistence of regular and chaotic phase space regions, allowing also for low amplitude perturbations idealised as periodic…

天体物理学 · 物理学 2007-05-23 Henry E. Kandrup , Steven J. Novotny

We demonstrate that chimera behavior can be observed in ensembles of phase oscillators with unidirectional coupling. For a small network consisting of only three identical oscillators (cyclic triple), tiny {\it chimera islands} arise in the…

混沌动力学 · 物理学 2021-10-27 Patrycja Jaros , Roman Levchenko , Tomasz Kapitaniak , Yuri Maistrenko

The microscopic model in which nodes interacting with each other are statistical systems is introduced. The nodes conditions are connected with a string of distinct microscopic configurations and depend on external parameters (pressure and…

统计力学 · 物理学 2007-05-23 V. Stepanov

The Gaussian free field (GFF) is considered in the background of random iso-height islands which is modeled by the site percolation with the occupation probability $p$. To realize GFF, we consider the Poisson equation in the presence of…

统计力学 · 物理学 2018-08-29 J. Cheraghalizadeh , M. N. Najafi , H. Mohammadzadeh

We develop a statistical theory describing quantum-mechanical scattering of a particle by a cavity when the geometry is such that the classical dynamics is chaotic. This picture is relevant to a variety of systems, ranging from atomic…

介观与纳米尺度物理 · 物理学 2009-10-31 P. A. Mello , H. U. Baranger

We show that the compactified extra dimension and the emergence of the island can provide clues about quantum gravity because their combination can solve the deepest puzzles of black hole physics. Suppose that the time dimension and the…

高能物理 - 理论 · 物理学 2023-06-21 Tran N. Hung , Cao H. Nam

Starting from the canonical ensemble over the space of pure quantum states, we obtain an integral representation for the partition function. This is used to calculate the magnetisation of a system of N spin-1/2 particles. The results…

量子物理 · 物理学 2013-09-13 Dorje C. Brody , Lane P. Hughston , Matthew F. Parry

The vacant set of random interlacements at level $u>0$, introduced in arXiv:0704.2560, is a percolation model on $\mathbb{Z}^d$, $d \geq 3$ which arises as the set of sites avoided by a Poissonian cloud of doubly infinite trajectories,…

概率论 · 数学 2015-01-23 Balazs Rath

Inelastic collapse is found in a two-dimensional system of inelastic hard disks confined between two walls which act as an energy source. As the coefficient of restitution is lowered, there is a transition between a state containing small…

软凝聚态物质 · 物理学 2009-10-31 Jan Tobochnik

The goal of this paper is to provide a short proof of the discontinuity of phase transition for the random-cluster model on the square lattice with parameter $q>4$. This result was recently shown via the so-called Bethe ansatz for the…

概率论 · 数学 2020-10-28 Gourab Ray , Yinon Spinka

We discuss the macroscopic quantum tunneling from the black hole to the white hole of the same mass. Previous calculations in Ref.[1] demonstrated that the probability of the tunneling is $p \propto \exp(-2S_\text{BH})$, where $S_\text{BH}$…

综合物理 · 物理学 2021-07-23 G. E. Volovik

For a system consisting of active soft spheres in three dimensions, we study the transition from a fluid where overlaps between particles can only occur for a short time after a collision to a state where clusters of overlapping particles…

软凝聚态物质 · 物理学 2019-06-28 Moumita Maiti , Michael Schmiedeberg

Air-sea exchange processes have been identified as essential for both short- and long-term atmospheric and ocean forecasts. The two phases of the fluid layer covering our planet interact across a vast range of scales that we need to explore…