Non-Markovianity, coherence, and system-environment correlations in a long-range collision model

B. Çakmak, M. Pezzutto, M. Paternostro, E. Müstecaplloǧlu

Research output: Contribution to journalArticle

24 Citations (Scopus)
143 Downloads (Pure)

Abstract

We consider the dynamics of a collisional model in which both the system and environment are embodied by spin-1/2 particles. In order to include non-Markovian features in our model, we introduce interactions among the environmental qubits and investigate the effect that different models of such interaction have on the degree of non-Markovianity of the system's dynamics. By extending that interaction beyond the nearest neighbor, we enhance the degree of non-Markovianity in the system's dynamics. A further significant increase can be observed if a collective interaction with the forthcoming environmental qubits is considered. However, the observed degree of non-Markovianity in this case is nonmonotonic with the increasing number of qubits included in the interaction. Moreover, one can establish a connection between the degree of non-Markovianity in the evolution of the system and the fading behavior of quantum coherence in its state as the number of collisions grows. We complement our study with an investigation of system-environment correlations and present an example of their importance on a physical upper bound on the trace distance derivative.

Original languageEnglish
Article number022109
JournalPhysical Review A
Volume96
Issue number2
DOIs
Publication statusPublished - 07 Aug 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of 'Non-Markovianity, coherence, and system-environment correlations in a long-range collision model'. Together they form a unique fingerprint.

  • Cite this