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.
Pomponio, O., Werner, M.A., Zaránd, G., Takacs, G. (2022). Bloch oscillations and the lack of the decay of the false vacuum in a one-dimensional quantum spin chain. SCIPOST PHYSICS, 12(2), 1-18 [10.21468/SciPostPhys.12.2.061].
Bloch oscillations and the lack of the decay of the false vacuum in a one-dimensional quantum spin chain
Pomponio, Octavio;
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.| File | Dimensione | Formato | |
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