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

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

SciPost Phys. 12, 061 (2022) · published 15 February 2022

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.

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