Quantum benchmarks for the storage or transmission of quantum light from minimal resources

Details Quantum benchmarks for the storage or transmission of quantum light from minimal resources Quantum benchmarks for the storage or transmission of quantum light from minimal resources

2009-10-08

arxiv.org/abs/0910.1458v2

Phys. Rev. A 81, 060306(R) (2010)

Physics

Quantum Physics

replaced by the published version, 5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.81.060306

We investigate several recently published benchmark criteria for storage or transmission of continuous-variable quantum information. A comparison reveals that criteria based on a Gaussian distribution of coherent states are most resilient to noise. We then address the issue of experimental resources and derive an equally strong benchmark, solely based on three coherent states and homodyne detection. This benchmark is further simplified in the presence of naturally occurring random phases, which remove the need for active input-state modulation.

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