Home Seminários Details - Clodoaldo Rulli (IF-UFF): Global quantum discord in multipartite systems

EMail Print

Seminários

Event 

Title:
Clodoaldo Rulli (IF-UFF): Global quantum discord in multipartite systems
When:
17.06.2011 11.00 h
Where:
Grupo de Óptica e Informação Quântica -
Category:
Seminários

Description

Seminário do grupo de Óptica e Informação Quântica

17/6/2011, 11h, sala A5-01.

Palestrante: Clodoaldo Rulli (IF-UFF)

Título: Global Quantum Discord in Multipartite Systems

Resumo: We propose a global measure for quantum correlations in multipartite systems, which is obtained by suitably recasting the quantum discord in terms of relative entropy and local von Neumann measurements. The measure is symmetric with respect to subsystem exchange and is shown to be non-negative for an arbitrary state. As an illustration, we consider tripartite correlations in the Werner-GHZ state and multipartite correlations at quantum criticality. In particular, in contrast with the pairwise quantum discord, we show that the global quantum discord is able to characterize the infinite-order quantum phase transition in the Ashkin-Teller spin chain.

Venue

Group:
Grupo de Óptica e Informação Quântica   -   Website
Street:
IF-UFF

Description

Grupo de Óptica e Informação Quântica do Instituto de Física da Universidade Federal Fluminense.
<<  Oct 19  >>
 Su  Mo  Tu  We  Th  Fr  Sa 
    1  2  3  4  5
  6  7  8  9101112
13141516171819
202123242526
2728293031