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Decoherence and relaxation of topological states in extended quantum Ising models

by Hannes Weisbrich, Wolfgang Belzig, Gianluca Rastelli

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Submission summary

Authors (as registered SciPost users): Wolfgang Belzig · Gianluca Rastelli · Hannes Weisbrich
Submission information
Preprint Link:  (pdf)
Date accepted: 2019-03-20
Date submitted: 2019-03-13 01:00
Submitted by: Weisbrich, Hannes
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Condensed Matter Physics - Theory
Approach: Theoretical


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.

Published as SciPost Phys. 6, 037 (2019)

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