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

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arxiv 2105.00014 v4 pith:TM6XGDJR submitted 2021-04-30 cond-mat.stat-mech hep-th

classification cond-mat.stat-mechhep-th
keywords decayvacuumblochchainfalseoscillationsquantumspin
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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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Cited by 1 Pith paper

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  1. Realizing Error Suppression in Partially Fault-Tolerant Quantum Simulations with IBM Quantum Computers

    quant-ph 2026-07 conditional novelty 6.0 of 10

    Partially fault-tolerant [[4,2,2]] Iceberg-code simulations on ibm_boston improve local Ising observables over unencoded baselines by a few percent in 1D and over 200% in 2D at late times via Observable-Ranked Postselection.

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