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Decoherence and relaxation of topological states in extended quantum Ising models

by Hannes Weisbrich, Wolfgang Belzig, Gianluca Rastelli

Submission summary

As Contributors: Wolfgang Belzig · Gianluca Rastelli · Hannes Weisbrich
Arxiv Link: https://arxiv.org/abs/1812.06899v2 (pdf)
Date accepted: 2019-03-20
Date submitted: 2019-03-13 01:00
Submitted by: Weisbrich, Hannes
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
Approach: Theoretical

Abstract

We study the decoherence and the relaxation dynamics of topological states in an extended class of quantum Ising chains which can present a manyfold ground state subspace. The leading interaction of the spins with the environment is assumed to be the local fluctuations of the transverse magnetic field. By deriving the Lindblad equation using the many-body states, we investigate the relation between decoherence, energy relaxation and topology. In particular, in the topological phase and at low temperature, we analyze the dephasing rates between the different degenerate ground states.

Ontology / Topics

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Decoherence Ising model Lindblad master equations Quantum many-body systems Relaxation dynamics

Published as SciPost Phys. 6, 037 (2019)



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