Memory effects in a quasiperiodic Fermi lattice

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Research units

  • University of Turku

Abstract

We investigate a system of fermions trapped in a quasiperiodic potential from an open quantum system theory perspective, designing a protocol in which an impurity atom (a two-level system) is coupled to a trapped fermionic cloud described by the noninteracting Aubry-André model. The Fermi system is prepared in a charge-density-wave state before it starts its relaxation. In this work we focus our attention on the time evolution of the impurity in such an out-of-equilibrium environment and study whether the induced dynamics can be classified as Markovian or non-Markovian. We find how the localized phase of the Aubry-André model displays evidence of strong and stable memory effects and can be considered as a controllable and robust non-Markovian environment.

Details

Original languageEnglish
Article number053608
Pages (from-to)1-6
JournalPhysical Review A
Volume98
Issue number5
Publication statusPublished - 5 Nov 2018
MoE publication typeA1 Journal article-refereed

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