Cited by 53Quantum many-body systemsAdvanced Thermodynamics and Statistical MechanicsQuantum chaos and dynamical systems

Power-law decay exponents: A dynamical criterion for predicting thermalization

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Távora, Marco, Torres-Herrera, E. J., Santos, Lea F.·2017·Physical Review A

Abstract

From the analysis of the relaxation process of isolated lattice many-body quantum systems quenched far from equilibrium, we deduce a criterion for predicting when they are certain to thermalize. It is based on the algebraic behavior $\ensuremath{\propto}{t}^{\ensuremath{-}\ensuremath{\gamma}}$ of the survival probability at long times. We show that the value of the power-law exponent $\ensuremath{\gamma}$ depends on the shape and filling of the weighted energy distribution of the initial state. Two scenarios are explored in detail: $\ensuremath{\gamma}\ensuremath{\ge}2$ and $\ensuremath{\gamma}<1$. Exponents $\ensuremath{\gamma}\ensuremath{\ge}2$ imply that the energy distribution of the initial state is ergodically filled and the eigenstates are uncorrelated, so thermalization is guaranteed to happen. In this case, the power-law behavior is caused by bounds in the energy spectrum. Decays with $\ensuremath{\gamma}<1$ emerge when the energy eigenstates are correlated and signal lack of ergodicity. They are typical of systems undergoing localization due to strong onsite disorder and are found also in clean integrable systems.

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Research works printed but not linked: 6

  1. [51]E. J. Torres-Herrera and L. F. Santos, arXiv:1610.02035v1 (accepted at the Annalen der Physik). · arXiv
  2. [61]E. J. Torres-Herrera and L. F. Santos, in AIP Proceedings , edited by P. Danielewicz and V. Zelevinsky (APS, East Lansing, Michigan, 2014).
  3. [68]V. K. B. Kota, Lecture Notes in Physics, vol. 884 (Springer, Heidelberg, 2014).
  4. [91]R. B. Sidje, ACM Trans. Math. Softw. 24 , 130 (1998).
  5. [99]T. Deguchi, P. R. Giri, and R. Hatakeyama, arXiv:1507.07470. · arXiv
  6. [101]M. Nowakowski and N. G. Kelkar, AIP Conference Proceedings 1030 , 250 (2008).

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Authors
Távora, M., Torres-Herrera, E. J., & Santos, L. F.
Affiliations
Yeshiva University (US)
Venue
Physical Review A
Published
2017-01-05
Volume
95
Issue
1
ISSN
  • 0556-2791 (ISSN-L)
  • 2469-9926
  • 2469-9934
OpenAlex
W2538409170
Cited by
53
References
96
Citations by year
2026: 1 · 2025: 5 · 2024: 3 · 2023: 1 · 2022: 3 · 2021: 5 · 2020: 7 · 2019: 10 · 2018: 12 · 2017: 6
FWCI
4.70
Type
journal article
Language
en
Open access
Locations
  • Physical Review A (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (DMR-1147430)
  • Consejo Nacional de Ciencia y Tecnología
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Advanced Thermodynamics and Statistical Mechanics
  • Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Quantum chaos and dynamical systems
Keywords
thermalization, power-law decay, survival probability, isolated quantum systems, quantum many-body systems, quench dynamics, ergodicity, energy distribution, localization, integrable systems

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