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

TL;DR

This paper investigates how Bloch oscillations in a one-dimensional quantum spin chain suppress the decay of a false vacuum, revealing lattice effects that influence quantum decay processes.

Contribution

It demonstrates that Bloch oscillations can inhibit false vacuum decay in a quantum spin chain, highlighting a lattice-specific mechanism affecting quantum stability.

Findings

Bloch oscillations suppress false vacuum decay.

Lattice effects cause suppression of correlation spreading.

Quantum decay can be controlled by lattice-induced phenomena.

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.