Quantum correlations and least disturbing local measurements

We examine the evaluation of the minimum information loss due to an unread local measurement in mixed states of bipartite systems, for a general entropic form. Such a quantity provides a measure of quantum correlations, reducing for pure states to the generalized entanglement entropy, while in the c...

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Detalles Bibliográficos
Autores principales:	Rossignoli, Raúl Dante, Canosa, Norma Beatriz, Ciliberti, Leonardo Francisco
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2011
Materias:	Ciencias Exactas minimum information loss bipartite systems Measurement maximally mixed marginals quantum correlations
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125988
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125988
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Exactas minimum information loss bipartite systems Measurement maximally mixed marginals quantum correlations
spellingShingle	Ciencias Exactas minimum information loss bipartite systems Measurement maximally mixed marginals quantum correlations Rossignoli, Raúl Dante Canosa, Norma Beatriz Ciliberti, Leonardo Francisco Quantum correlations and least disturbing local measurements
topic_facet	Ciencias Exactas minimum information loss bipartite systems Measurement maximally mixed marginals quantum correlations
description	We examine the evaluation of the minimum information loss due to an unread local measurement in mixed states of bipartite systems, for a general entropic form. Such a quantity provides a measure of quantum correlations, reducing for pure states to the generalized entanglement entropy, while in the case of mixed states it vanishes just for classically correlated states with respect to the measured system, as the quantum discord. General stationary conditions are provided, together with their explicit form for general two-qubit states. Closed expressions for the minimum information loss as measured by quadratic and cubic entropies are also derived for general states of two-qubit systems. As an application, we analyze the case of states with maximally mixed marginals, where a general evaluation is provided, as well as X states and the mixture of two aligned states.
format	Articulo Articulo
author	Rossignoli, Raúl Dante Canosa, Norma Beatriz Ciliberti, Leonardo Francisco
author_facet	Rossignoli, Raúl Dante Canosa, Norma Beatriz Ciliberti, Leonardo Francisco
author_sort	Rossignoli, Raúl Dante
title	Quantum correlations and least disturbing local measurements
title_short	Quantum correlations and least disturbing local measurements
title_full	Quantum correlations and least disturbing local measurements
title_fullStr	Quantum correlations and least disturbing local measurements
title_full_unstemmed	Quantum correlations and least disturbing local measurements
title_sort	quantum correlations and least disturbing local measurements
publishDate	2011
url	http://sedici.unlp.edu.ar/handle/10915/125988
work_keys_str_mv	AT rossignolirauldante quantumcorrelationsandleastdisturbinglocalmeasurements AT canosanormabeatriz quantumcorrelationsandleastdisturbinglocalmeasurements AT cilibertileonardofrancisco quantumcorrelationsandleastdisturbinglocalmeasurements
bdutipo_str	Repositorios
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Quantum correlations and least disturbing local measurements

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