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Non-Markovianity through Accessible Information

Fanchini, F. F. ; Karpat, G. ; Çakmak, B. ; Castelano, L. K. ; Aguilar, G. H. ; Farías, O. Jiménez ; Walborn, S. P. ; Ribeiro, P. H. Souto ; de Oliveira, M. C.

Physical review letters, 2014-05, Vol.112 (21), Article 210402 [Periódico revisado por pares]

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  • Título:
    Non-Markovianity through Accessible Information
  • Autor: Fanchini, F. F. ; Karpat, G. ; Çakmak, B. ; Castelano, L. K. ; Aguilar, G. H. ; Farías, O. Jiménez ; Walborn, S. P. ; Ribeiro, P. H. Souto ; de Oliveira, M. C.
  • Assuntos: Accessibility ; Entropy ; Markov processes ; Scripts ; Signatures
  • É parte de: Physical review letters, 2014-05, Vol.112 (21), Article 210402
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: 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 [scriptE], acquires information about a system [scriptS], by means of its measurement apparatus [scriptA]. 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.
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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