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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Non-Markovianity through Accessible Information

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Author(s):
Fanchini, F. F. [1] ; Karpat, G. [1] ; Cakmak, B. [2] ; Castelano, L. K. [3] ; Aguilar, G. H. [4] ; Jimenez Farias, O. [4] ; Walborn, S. P. [4] ; Souto Ribeiro, P. H. [4] ; de Oliveira, M. C. [5]
Total Authors: 9
Affiliation:
[1] UNESP Univ Estadual Paulista, Fac Ciencias, BR-17033360 Bauru, SP - Brazil
[2] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul - Turkey
[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ - Brazil
[5] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Physical Review Letters; v. 112, n. 21 MAY 29 2014.
Web of Science Citations: 75
Abstract

The degree of non-Markovianity of quantum processes has been characterized in several different ways in the recent literature. However, the relationship between the non-Markovian behavior and the flow of information between the system and the environment through an entropic measure has not been yet established. We propose an entanglement-based measure of non-Markovianity by employing the concept of assisted knowledge, where the environment E, acquires information about a system S, by means of its measurement apparatus A. The assisted knowledge, based on the accessible information in terms of von Neumann entropy, monotonically increases in time for all Markovian quantum processes. We demonstrate that the signatures of non-Markovianity can be captured by the nonmonotonic behavior of the assisted knowledge. We explore this scenario for a two-level system undergoing a relaxation process, through an experimental implementation using an optical approach that allows full access to the state of the environment. (AU)

FAPESP's process: 12/50464-0 - A study of quantum correlations in open quantum systems
Grantee:Felipe Fernandes Fanchini
Support type: Regular Research Grants
FAPESP's process: 08/57856-6 - National Institute of Science and Technology - Quantum Information
Grantee:Amir Ordacgi Caldeira
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/18558-5 - Studying the monogamic relations between entanglement and quantum correlations
Grantee:Goktug Karpat
Support type: Scholarships in Brazil - Post-Doctorate