Experimental characterization of Gaussian quantum communication channels

Abstract

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.

9 pages, 4 figures, submitted to Physical Review A

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Cited by in corpus (5)

• Full characterization of Gaussian bipartite entangled states by a single homodyne detector
• Preparation of distilled and purified continuous variable entangled states
• A route to observing ponderomotive entanglement with optically trapped mirrors
• Teleportation of two-mode squeezed states
• Experimentally friendly bounds on non-Gaussian entanglement from second moments