The study of classical and quantum correlations in bipartite and multipartite systems is crucial for the development of quantum information theory. Among the quantifiers adopted in tripartite systems, the genuine tripartite quantum discord (GTQD), estimating the amount of quantum correlations shared among all the subsystems, plays a key role since it represents the natural extension of quantum discord used in bipartite systems. In this paper, we derive an analytical expression of GTQD for three-qubit systems characterized by a subclass of symmetrical X-states. Our approach has been tested on both GHZ and maximally mixed states reproducing the expected results. Furthermore, we believe that the procedure here developed constitutes a valid guideline to investigate quantum correlations in form of discord in more general multipartite systems.

Analytical expression of genuine tripartite quantum discord for symmetrical X-states / Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo. - In: QUANTUM INFORMATION PROCESSING. - ISSN 1570-0755. - STAMPA. - 14:2(2015), pp. 573-592. [10.1007/s11128-014-0882-z]

Analytical expression of genuine tripartite quantum discord for symmetrical X-states

BEGGI, ANDREA;BORDONE, Paolo
2015

Abstract

The study of classical and quantum correlations in bipartite and multipartite systems is crucial for the development of quantum information theory. Among the quantifiers adopted in tripartite systems, the genuine tripartite quantum discord (GTQD), estimating the amount of quantum correlations shared among all the subsystems, plays a key role since it represents the natural extension of quantum discord used in bipartite systems. In this paper, we derive an analytical expression of GTQD for three-qubit systems characterized by a subclass of symmetrical X-states. Our approach has been tested on both GHZ and maximally mixed states reproducing the expected results. Furthermore, we believe that the procedure here developed constitutes a valid guideline to investigate quantum correlations in form of discord in more general multipartite systems.
2015
23-nov-2014
14
2
573
592
Analytical expression of genuine tripartite quantum discord for symmetrical X-states / Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo. - In: QUANTUM INFORMATION PROCESSING. - ISSN 1570-0755. - STAMPA. - 14:2(2015), pp. 573-592. [10.1007/s11128-014-0882-z]
Beggi, Andrea; Buscemi, Fabrizio; Bordone, Paolo
File in questo prodotto:
File Dimensione Formato  
10.1007_s11128-014-0882-z.pdf

Accesso riservato

Descrizione: Articolo principale
Tipologia: Versione pubblicata dall'editore
Dimensione 1.36 MB
Formato Adobe PDF
1.36 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
BordoneAnalyticalpost-print.pdf

Open Access dal 25/11/2015

Tipologia: Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione 758.83 kB
Formato Adobe PDF
758.83 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1074711
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 21
social impact