Decoherence and relaxation of topological states in extended quantum Ising models

Anno: 2019

Autori: H. Weisbrich; W. Belzig; G. Rastelli

Affiliazione autori: Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany. Univ Konstanz, Zukunftskolleg, D-78457 Constance, Germany.

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.

Giornale/Rivista: SCIPOST PHYSICS

Volume: 6 (3)      Da Pagina: 037-1  A: 037-24

Maggiori informazioni: This work was supported by the German Excellence Initiative through the Zukunftskolleg, the Deutsche Forschung Gemeinschaft (DFG) through the SFB 767, Project No. 32152442, and by the MWK Baden-Wurttemberg Research Seed Capital (RiSC) funding.
Parole chiavi: decoherence, Ising models, Open quantum many-body systems
DOI: 10.21468/SciPostPhys.6.3.037