Non-Markovianity through flow of information between a system and an environment


Autoria(s): Haseli, S.; Karpat, G.; Salimi, S.; Khorashad, A. S.; Fanchini, F. F.; Cakmak, B.; Aguilar, G. H.; Walborn, S. P.; Souto Ribeiro, P. H.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

18/03/2015

18/03/2015

24/11/2014

Resumo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Processo FAPESP: 12/50464-0

Processo FAPESP: 12/18558-5

Exchange of information between a quantum system and its surrounding environment plays a fundamental role in the study of the dynamics of open quantum systems. Here we discuss the role of the information exchange in the non-Markovian behavior of dynamical quantum processes following the decoherence approach, where we consider a quantum system that is initially correlated with its measurement apparatus, which in turn interacts with the environment. We introduce away of looking at the information exchange between the system and environment using the quantum loss, which is shown to be closely related to the measure of non-Markovianity based on the quantum mutual information. We also extend the results of Fanchini et al. [Phys. Rev. Lett. 112, 210402 (2014)] in several directions, providing a more detailed investigation of the use of the accessible information for quantifying the backflow of information from the environment to the system. Moreover, we reveal a clear conceptual relation between the entanglement-and mutual-information-based measures of non-Markovianity in terms of the quantum loss and accessible information. We compare different ways of studying the information flow in two theoretical examples. We also present experimental results on the investigation of the quantum loss and accessible information for a two-level system undergoing a zero temperature amplitude damping process. We use an optical approach that allows full access to the state of the environment.

Formato

10

Identificador

http://dx.doi.org/10.1103/PhysRevA.90.052118

Physical Review A. College Pk: Amer Physical Soc, v. 90, n. 5, 10 p., 2014.

1050-2947

http://hdl.handle.net/11449/117032

10.1103/PhysRevA.90.052118

WOS:000345536700004

WOS000345536700004.pdf

Idioma(s)

eng

Publicador

Amer Physical Soc

Relação

Physical Review A

Direitos

closedAccess

Tipo

info:eu-repo/semantics/article