Experimental characterization of Gaussian quantum communication channels

Details Experimental characterization of Gaussian quantum communication channels Experimental characterization of Gaussian quantum communication channels

2007-06-22

arxiv.org/abs/0706.3269v1

Physics

Quantum Physics

9 pages, 4 figures, submitted to Physical Review A

Scientific paper

10.1103/PhysRevA.76.012323

We present a full experimental characterization of continuous variable quantum communication channels established by shared entanglement together with local operations and classical communication. The resulting teleportation channel was fully characterized by measuring all elements of the covariance matrix of the shared two-mode squeezed Gaussian state. From the experimental data we determined the lower bound to the quantum channel capacity, the teleportation fidelity of coherent states and the logarithmic negativity and the purity of the shared state. Additionally, a positive secret key rate was obtained for two of the established channels.

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