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Quantum quenches in isolated quantum glasses out of equilibrium

Abstract : In this work, we address the question of how a closed quantum system thermalises in the presence of a random external potential. By investigating the quench dynamics of the isolated quantum spherical p-spin model, a paradigmatic model of a mean-field glass, we aim to shed new light on this complex problem. Employing a closed-time Schwinger-Keldysh path integral formalism, we first initialise the system in a random, infinite-temperature configuration and allow it to equilibrate in contact with a thermal bath before switching off the bath and performing a quench. We find evidence that increasing the strength of either the interactions or the quantum fluctuations can act to lower the effective temperature of the isolated system and stabilise glassy behaviour.
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https://hal-cea.archives-ouvertes.fr/cea-02395083
Contributor : Emmanuelle de Laborderie <>
Submitted on : Wednesday, April 1, 2020 - 11:11:47 AM
Last modification on : Wednesday, October 14, 2020 - 4:21:52 AM

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  • HAL Id : cea-02395083, version 1
  • ARXIV : 1904.03147

Citation

S. Thomson, P. Urbani, M. Schiró. Quantum quenches in isolated quantum glasses out of equilibrium. 2020. ⟨cea-02395083⟩

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