Interaction-induced correlations and non-Markovianity of quantum dynamics

A. Smirne*, L. Mazzola, M. Paternostro, B. Vacchini

*Corresponding author for this work

Research output: Contribution to journalArticle

29 Citations (Scopus)
132 Downloads (Pure)

Abstract

We investigate the conditions under which the trace distance between two different states of a given open system increases in time due to the interaction with an environment, therefore signaling non-Markovianity. We find that the finite-time difference in trace distance is bounded by two sharply defined quantities that are strictly linked to the occurrence of system-environment correlations created throughout their interaction and affecting the subsequent evolution of the system. This allows us to shed light on the origin of non-Markovian behaviors in quantum dynamics. We best illustrate our findings by tackling two physically relevant examples: a non-Markovian dephasing mechanism that has been the focus of a recent experimental endeavor and the open-system dynamics experienced by a spin connected to a finite-size quantum spin chain.

Original languageEnglish
Article number052129
Number of pages8
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume87
Issue number5
DOIs
Publication statusPublished - 22 May 2013

Keywords

  • SYSTEM-ENVIRONMENT CORRELATIONS
  • REGRESSION THEOREM
  • SEMIGROUPS
  • NOISE

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this