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Bloch oscillations and the lack of the decay of the false vacuum in a one-dimensional quantum spin chain

by O. Pomponio, M. A. Werner, G. Zarand, G. Takacs

This Submission thread is now published as SciPost Phys. 12, 061 (2022)

Submission summary

As Contributors: Gabor Takacs
Arxiv Link: https://arxiv.org/abs/2105.00014v4 (pdf)
Date accepted: 2022-02-04
Date submitted: 2022-01-24 09:22
Submitted by: Takacs, Gabor
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
  • Quantum Physics
Approaches: Theoretical, Computational

Abstract

We consider the decay of the false vacuum, realised within a quantum quench into an anti-confining regime of the Ising spin chain with a magnetic field opposite to the initial magnetisation. Although the effective linear potential between the domain walls is repulsive, the time evolution of correlations still shows a suppression of the light cone and a reduction of vacuum decay. The suppressed decay is a lattice effect, and can be assigned to emergent Bloch oscillations.

Published as SciPost Phys. 12, 061 (2022)



Author comments upon resubmission

We added text to the introduction, and also a detailed discussion to the conclusion, regarding the results of Refs. [34] and [38].

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