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RESEARCH PRODUCT
Quantum benchmark for teleportation and storage of squeezed states.
Gerardo AdessoGerardo AdessoGiulio Chiribellasubject
PhysicsCondensed Matter::Quantum GasesQuantum Physicsmedia_common.quotation_subjectGeneral Physics and AstronomyFidelityFOS: Physical sciencesQuantum PhysicsUpper and lower boundsTeleportationDisplacement (vector)Quantum mechanicsBenchmark (computing)Quantum information scienceQuantum Physics (quant-ph)QuantumSqueezed coherent statemedia_commondescription
We provide a quantum benchmark for teleportation and storage of single-mode squeezed states with zero displacement and a completely unknown degree of squeezing along a given direction. For pure squeezed input states, a fidelity higher than 81.5% has to be attained in order to outperform any classical strategy based on an estimation of the unknown squeezing and repreparation of squeezed states. For squeezed thermal input states, we derive an upper and a lower bound on the classical average fidelity which tighten for moderate degree of mixedness. These results enable a critical discussion of recent experiments with squeezed light.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-11-22 | Physical review letters |