Distributed correlations and information flows within a hybrid multipartite quantum-classical system

Bruno Leggio; Rosario Lo; Diogo Soares-Pinto; Paweł Horodecki; Giuseppe Compagno

doi:10.1103/physreva.92.032311

Distributed correlations and information flows within a hybrid multipartite quantum-classical system

Abstract

Understanding the non-Markovian mechanisms underlying the revivals of quantum entanglement in the presence of classical environments is central in the theory of quantum information. Tentative interpretations have been given by either the role of the environment as a control device or the concept of hidden entanglement. We address this issue from an information-theoretic point of view. To this aim, we consider a paradigmatic tripartite system, already realized in the laboratory, made of two independent qubits and a random classical field locally interacting with one qubit alone.We study the dynamical relationship between the two-qubit entanglement and the genuine tripartite correlations of the overall system, finding that collapse and revivals of entanglement correspond, respectively, to the rise and fall of the overall tripartite correlations. Interestingly, entanglement dark periods can enable plateaux of nonzero tripartite correlations. We then explain this behavior in terms of information flows among the different parties of the system. Besides showcasing the phenomenon of the freezing of overall correlations, our results provide insights on the origin of retrieval of entanglement within a hybrid quantum-classical system.

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Authors (5)

Bruno Leggio
- Uniwersytet Montpellier France
Rosario Lo
- Uniwersytet w Palermo Wydział Fizyki i Chemii
Diogo Soares-Pinto
- Uniwersytet Sao Paulo Wydział Fizyki
Paweł Horodecki prof. dr hab.
Giuseppe Compagno
- Uniwersytet w Palermo Wydział Fizyki i Chemii

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DOI:: Digital Object Identifier (open in new tab) 10.1103/PhysRevA.92.032311
License: Copyright (2015 American Physical Society)

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: PHYSICAL REVIEW A no. 92, edition 3, pages 1 - 8,
ISSN: 2469-9926
Language:: English
Publication year:: 2015
Bibliographic description:: Leggio B., Lo R., Soares-Pinto D., Horodecki P., Compagno G.: Distributed correlations and information flows within a hybrid multipartite quantum-classical system// PHYSICAL REVIEW A. -Vol. 92, iss. 3 (2015), s.1-8
DOI:: Digital Object Identifier (open in new tab) 10.1103/physreva.92.032311
Verified by:: Gdańsk University of Technology