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Quantum benchmarks for pure single-mode Gaussian states

Chiribella, Giulio; Adesso, Gerardo

Authors

Giulio Chiribella

Gerardo Adesso



Abstract

Teleportation and storage of continuous variable states of light and atoms are essential building blocks for the realization of large-scale quantum networks. Rigorous validation of these implementations require identifying, and surpassing, benchmarks set by the most effective strategies attainable without the use of quantum resources. Such benchmarks have been established for special families of input states, like coherent states and particular subclasses of squeezed states. Here we solve the longstanding problem of defining quantum benchmarks for general pure Gaussian single-mode states with arbitrary phase, displacement, and squeezing, randomly sampled according to a realistic prior distribution. As a special case, we show that the fidelity benchmark for teleporting squeezed states with totally random phase and squeezing degree is 1/2, equal to the corresponding one for coherent states. We discuss the use of entangled resources to beat the benchmarks in experiments.

Journal Article Type Article
Publication Date Jan 7, 2014
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 112
Issue 1
APA6 Citation Chiribella, G., & Adesso, G. (2014). Quantum benchmarks for pure single-mode Gaussian states. Physical Review Letters, 112(1), doi:10.1103/PhysRevLett.112.010501
DOI https://doi.org/10.1103/PhysRevLett.112.010501
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.010501
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information © 2014 American Physical Society

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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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