Memory effects in a quasiperiodic Fermi lattice



: Francesco Cosco, Sabrina Maniscalco

Publisher: AMER PHYSICAL SOC

: 2018

: Physical Review A

: PHYSICAL REVIEW A

: PHYS REV A

: ARTN 053608

: 98

: 5

: 6

: 2469-9926

: 2469-9934

DOI: https://doi.org/10.1103/PhysRevA.98.053608


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-Andre 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-Andre model displays evidence of strong and stable memory effects and can be considered as a controllable and robust non-Markovian environment.



Last updated on 2024-26-11 at 11:51