• Letter

Effect of pressure on thermalization of one-dimensional nonlinear chains

Weicheng Fu, Yong Zhang, and Hong Zhao
Phys. Rev. E 104, L032104 – Published 17 September 2021

Abstract

Pressure plays a vital role in changing the transport properties of matter. To understand this phenomenon at a microscopic level, we here focus on a more fundamental problem, i.e., how pressure affects the thermalization properties of solids. As illustrating examples, we study the thermalization behavior of the monatomic chain and the mass-disordered chain of Fermi-Pasta-Ulam-Tsingou-β under different strains in the thermodynamic limit. It is found that the pressure-induced change in integrability results in qualitatively different thermalization processes for the two kinds of chains. However, for both cases, the thermalization time follows the same law—it is inversely proportional to the square of the nonintegrability strength. This result suggests that pressure can significantly change the integrability of a system, which provides a new perspective for understanding the pressure-dependent thermal transport behavior.

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  • Received 31 May 2021
  • Accepted 30 August 2021

DOI:https://doi.org/10.1103/PhysRevE.104.L032104

©2021 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & Thermodynamics

Authors & Affiliations

Weicheng Fu1,3, Yong Zhang2,3,*, and Hong Zhao2,3

  • 1Department of Physics, Tianshui Normal University, Tianshui 741001, Gansu, China
  • 2Department of Physics, Xiamen University, Xiamen 361005, Fujian, China
  • 3Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, Lanzhou, Gansu 730000, China

  • *yzhang75@xmu.edu.cn

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Issue

Vol. 104, Iss. 3 — September 2021

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