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When employing non-linear methods to characterise complex systems, it is important to determine to what extent they are capturing genuine non-linear phenomena that could not be assessed by simpler spectral methods. Specifically, we are…

统计方法学 · 统计学 2021-09-22 Pedro A. M. Mediano , Fernando E. Rosas , Adam B. Barrett , Daniel Bor

We describe a method for analyzing the phase space structures of Hamiltonian systems. This method is based on a time-frequency decomposition of a trajectory using wavelets. The ridges of the time-frequency landscape of a trajectory, also…

混沌动力学 · 物理学 2009-11-07 C. Chandre , S. Wiggins , T. Uzer

The existence and search for thermodynamic phase transitions is of unfading interest. In this paper, we present numerical evidence of dynamical phase transitions occurring in boundary driven systems with a constrained integrated current. It…

统计力学 · 物理学 2017-03-29 Ohad Shpielberg , Yaroslav Don , Eric Akkermans

Optical phase-spaces represent fields of any spatial coherence, and are typically measured through phase-retrieval methods involving a computational inversion, interference, or a resolution-limiting lenslet array. Recently, a weak-values…

光学 · 物理学 2018-09-12 Samuel H. Knarr , Daniel J. Lum , James Schneeloch , John C. Howell

We present a method based on symbolic dynamics for the detection of synchronization in networks of coupled maps and distinguishing between chaotic and random iterations. The symbolic dynamics are defined using special partitions of the…

混沌动力学 · 物理学 2007-05-23 Sarika Jalan , Fatihcan M. Atay , Jürgen Jost

In frameworks of the phenomenological approach we analyze of the phase diagram of mixed compounds. We obtain space groups of symmetry of the real structures as result of phase transition from close-packed degenerate structure. The theory of…

统计力学 · 物理学 2007-05-23 B. R. Gadjiev

Our general subject is the emergence of phases, and phase transitions, in large networks subjected to a few variable constraints. Our main result is the analysis, in the model using edge and triangle subdensities for constraints, of a sharp…

组合数学 · 数学 2017-03-16 Charles Radin , Kui Ren , Lorenzo Sadun

The phase space slicing method of two cutoffs for next-to-leading-order Monte-Carlo style QCD corrections has been applied to many physics processes. The method is intuitive, simple to implement, and relies on a minimum of process dependent…

高能物理 - 唯象学 · 物理学 2009-11-07 B. W. Harris , J. F. Owens

Improvements in computational and experimental capabilities are rapidly increasing the amount of scientific data that is routinely generated. In applications that are constrained by memory and computational intensity, excessively large…

机器学习 · 计算机科学 2023-02-28 Malik Hassanaly , Bruce A. Perry , Michael E. Mueller , Shashank Yellapantula

In a physical system, changing parameters such as temperature can induce a phase transition: an abrupt change from one state of matter to another. Analogous phenomena have recently been observed in large language models. Typically, the task…

机器学习 · 计算机科学 2024-05-28 Julian Arnold , Flemming Holtorf , Frank Schäfer , Niels Lörch

This study explores a method to characterize temporal structure of intermittent phase locking in oscillatory systems. When an oscillatory system is in a weakly synchronized regime away from a synchronization threshold, it spends most of the…

动力系统 · 数学 2011-09-21 Sungwoo Ahn , Choongseok Park , Leonid L. Rubchinsky

It is pointed out that phase structures of gauge theories compactified on non-simply connected spaces are not trivial. As a demonstration, an SU(2) gauge model on $M^3\otimes S^1$ is studied and is shown to possess three phases: Hosotani,…

高能物理 - 理论 · 物理学 2009-11-07 Hisaki Hatanaka , Katsuhiko Ohnishi , Makoto Sakamoto , Kazunori Takenaga

Phase-space analysis has been widely used in the past for the study of optical resonant systems. While it is usually employed to analyze the far-field behaviour of resonant systems we focus here on its applicability to coupling problems. By…

光学 · 物理学 2021-04-07 Martí Bosch , Arne Behrens , Stefan Sinzinger , Martina Hentschel

Recent developments of imaging techniques enable researchers to visualize materials at the atomic resolution to better understand the microscopic structures of materials. This paper aims at automatic and quantitative characterization of…

材料科学 · 物理学 2018-05-11 Jianfeng Lu , Haizhao Yang

A coupled-map lattice showing complex behavior in presence of a fully negative Lyapunov spectrum is considered. A phase transition from ordered to disordered evolution upon changing diffusive coupling is studied in detail. Various…

chao-dyn · 物理学 2008-02-03 F. Cecconi , R. Livi , A. Politi

We study the structure of the phase diagram for systems consisting of 2- and 3- level particles dipolarly interacting with a 1-mode electromagnetic field, inside a cavity, paying particular attention to the case of a finite number of…

量子物理 · 物理学 2015-02-04 Eduardo Nahmad-Achar , Sergio Cordero , Octavio Castaños , Ramón López-Peña

Synaptic interactions structure the phase space of the dynamics of neural circuits and constrain neural computation. Understanding how requires methods that handle those discrete interactions, yet few exist. Recently, it was discovered that…

无序系统与神经网络 · 物理学 2019-05-15 Maximilian Puelma Touzel , Fred Wolf

A general phase reduction method for a network of coupled dynamical elements exhibiting collective oscillations, which is applicable to arbitrary networks of heterogeneous dynamical elements, is developed. A set of coupled adjoint equations…

适应与自组织系统 · 物理学 2018-04-04 Hiroya Nakao , Sho Yasui , Masashi Ota , Kensuke Arai , Yoji Kawamura

We use Monte Carlo simulation to study the phase diagram of three-dimensional dynamical triangulations with a boundary. Three phases are indentified and characterized. One of these phases is a new, boundary dominated phase; a simple…

高能物理 - 格点 · 物理学 2009-10-31 Simeon Warner , Simon Catterall , Ray Renken

Dynamical behaviour of discrete dynamical systems has been investigated extensively in the past few decades. However, in several applications, long term memory plays an important role in the evolution of dynamical variables. The definition…