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Hierarchy of steering criteria based on moments for all bipartite quantum systems

Kogias, Ioannis; Skrzypczyk, Paul; Cavalcanti, Daniel; Acín, Antonio; Adesso, Gerardo

Authors

Ioannis Kogias

Paul Skrzypczyk

Daniel Cavalcanti

Antonio Acín



Abstract

Einstein-Podolsky-Rosen steering is a manifestation of quantum correlations exhibited by quantum systems that allows for entanglement certification when one of the subsystems is not characterized. Detecting the steerability of quantum states is essential to assess their suitability for quantum information protocols with partially trusted devices. We provide a hierarchy of sufficient conditions for the steerability of bipartite quantum states of any dimension, including continuous variable states. Previously known steering criteria are recovered as special cases of our approach. The proposed method allows us to derive optimal steering witnesses for arbitrary families of quantum states and provides a systematic framework to analytically derive nonlinear steering criteria. We discuss relevant examples and, in particular, provide an optimal steering witness for a lossy single-photon Bell state; the witness can be implemented just by linear optics and homodyne detection and detects steering with a higher loss tolerance than any other known method. Our approach is readily applicable to multipartite steering detection and to the characterization of joint measurability.

Citation

Kogias, I., Skrzypczyk, P., Cavalcanti, D., Acín, A., & Adesso, G. (2015). Hierarchy of steering criteria based on moments for all bipartite quantum systems. Physical Review Letters, 115(21), https://doi.org/10.1103/PhysRevLett.115.210401

Journal Article Type Article
Acceptance Date Oct 16, 2015
Publication Date Nov 17, 2015
Deposit Date Feb 24, 2017
Publicly Available Date Feb 24, 2017
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 115
Issue 21
DOI https://doi.org/10.1103/PhysRevLett.115.210401
Public URL http://eprints.nottingham.ac.uk/id/eprint/40768
Publisher URL http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.210401
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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