Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains

We discuss a generalization of the conditional entropy and one-way information deficit in quantum systems, based on general entropic forms. The formalism allows to consider simple entropic forms for which a closed evaluation of the associated optimization problem in qudit-qubit systems is shown to b...

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Detalles Bibliográficos
Autores principales: Canosa, Norma Beatriz, Cerezo de la Roca, Marco Vinicio Sebastián, Gigena, Nicolás Alejandro, Rossignoli, Raúl Dante, Fernandes Fanchini, Felipe, Oliveira Soares Pinto, Diogo, Adesso, Gerardo
Formato: Libro Capitulo de libro
Lenguaje:Español
Publicado: Springer 2017
Materias:
Ciencias Exactas
Quantum Correlations
Quantum Discord
Quantum Spin Chains
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75046
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75046
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Exactas
Quantum Correlations
Quantum Discord
Quantum Spin Chains
spellingShingle Ciencias Exactas
Quantum Correlations
Quantum Discord
Quantum Spin Chains
Canosa, Norma Beatriz
Cerezo de la Roca, Marco Vinicio Sebastián
Gigena, Nicolás Alejandro
Rossignoli, Raúl Dante
Fernandes Fanchini, Felipe
Oliveira Soares Pinto, Diogo
Adesso, Gerardo
Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
topic_facet Ciencias Exactas
Quantum Correlations
Quantum Discord
Quantum Spin Chains
description We discuss a generalization of the conditional entropy and one-way information deficit in quantum systems, based on general entropic forms. The formalism allows to consider simple entropic forms for which a closed evaluation of the associated optimization problem in qudit-qubit systems is shown to become feasible, allowing to approximate that of the quantum discord. As application, we examine quantum correlations of spin pairs in the exact ground state of finiteXYspin chains in a magnetic field through the quantum discord and information deficit. While these quantities show a similar behavior, their optimizing measurements exhibit significant differences, which can be understood and predicted through the previous approximations. The remarkable behavior of these quantities in the vicinity of transverse and non-transverse factorizing fields is also discussed.
format Libro
Capitulo de libro
author Canosa, Norma Beatriz
Cerezo de la Roca, Marco Vinicio Sebastián
Gigena, Nicolás Alejandro
Rossignoli, Raúl Dante
Fernandes Fanchini, Felipe
Oliveira Soares Pinto, Diogo
Adesso, Gerardo
author_facet Canosa, Norma Beatriz
Cerezo de la Roca, Marco Vinicio Sebastián
Gigena, Nicolás Alejandro
Rossignoli, Raúl Dante
Fernandes Fanchini, Felipe
Oliveira Soares Pinto, Diogo
Adesso, Gerardo
author_sort Canosa, Norma Beatriz
title Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
title_short Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
title_full Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
title_fullStr Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
title_full_unstemmed Quantum discord and entropic measures of quantum correlations: Optimization and behavior in finite XY spin chains
title_sort quantum discord and entropic measures of quantum correlations: optimization and behavior in finite xy spin chains
publisher Springer
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/75046
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