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arXiv · 2105.00014

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
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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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O. Pomponio, M. A. Werner, G. Zarand, G. Takacs. 2021-04-30. Bloch oscillations and the lack of the decay of the false vacuum in a one-dimensional quantum spin chain. https://doi.org/10.21468/scipostphys.12.2.061

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