Phase-Covariant Quantum Benchmarks

Details Phase-Covariant Quantum Benchmarks Phase-Covariant Quantum Benchmarks

2008-07-31

arxiv.org/abs/0807.5126v1

Phys. Rev. A 79, 050301(R) (2009)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.79.050301

We give a quantum benchmark for teleportation and quantum storage experiments suited for pure and mixed test states. The benchmark is based on the average fidelity over a family of phase-covariant states and certifies that an experiment can not be emulated by a classical setup, i.e., by a measure-and-prepare scheme. We give an analytical solution for qubits, which shows important differences with standard state estimation approach, and compute the value of the benchmark for coherent and squeezed states, both pure and mixed.

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