Mixed State Entanglement Measures for Intermediate Separability

Autor(en)

Tsubasa Ichikawa, Marcus Huber, Philipp Krammer, Beatrix Hiesmayr

Abstrakt

To determine whether a given multipartite quantum state is separable with respect to some partition, we construct a family of entanglement measures {Rm(?)}. This is done utilizing generalized concurrences as building blocks which are defined by flipping of M constituents and indicate states that are separable with regard to bipartitions when vanishing. Furthermore, we provide an analytically computable lower bound for {Rm(?)} via a simple ordering relation of the convex roof extension. Using the derived lower bound, we illustrate the effect of the isotropic noise on a family of four-qubit mixed states for each intermediate separability.

Organisation(en)

Teilchenphysik

Externe Organisation(en)

Kinki University

Journal

International Journal of Quantum Information (IJQI)

Band

8

Seiten

677-685

Anzahl der Seiten

9

ISSN

0219-7499

DOI

https://doi.org/10.1142/S0219749910006526

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

103036 Theoretische Physik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/mixed-state-entanglement-measures-for-intermediate-separability(9c73ddb9-b9f6-4524-b941-6c95edb31cd3).html