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Quantum Information Processing

Quantum correlations for bipartite continuous-variable systems

  • 01-04-2018
Published in:
Authors
Ruifen Ma
Jinchuan Hou
Xiaofei Qi
Yangyang Wang
Published in
Quantum Information Processing | Issue 4/2018

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Abstract

Two quantum correlations Q and \(Q_\mathcal P\) for \((m+n)\)-mode continuous-variable systems are introduced in terms of average distance between the reduced states under the local Gaussian positive operator-valued measurements, and analytical formulas of these quantum correlations for bipartite Gaussian states are provided. It is shown that the product states do not contain these quantum correlations, and conversely, all \((m+n)\)-mode Gaussian states with zero quantum correlations are product states. Generally, \(Q\ge Q_{\mathcal P}\), but for the symmetric two-mode squeezed thermal states, these quantum correlations are the same and a computable formula is given. In addition, Q is compared with Gaussian geometric discord for symmetric squeezed thermal states.

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previous article Dynamical evolution of entanglement of a three-qubit system driven by a classical environmental colored noise
next article State-independent uncertainty relations and entanglement detection
Title
Quantum correlations for bipartite continuous-variable systems
Authors
Ruifen Ma
Jinchuan Hou
Xiaofei Qi
Yangyang Wang
Publication date
01-04-2018
Publisher
Springer US
Published in
Quantum Information Processing / Issue 4/2018
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-018-1866-1
This content is only visible if you are logged in and have the appropriate permissions.

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