Experimental characterization of Gaussian quantum-communication channels

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.012323· OSTI ID:21011190

Di Guglielmo, James; Hage, Boris; Franzen, Alexander; Schnabel, Roman ^[1]; Fiurasek, Jaromir ^[2]

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1. Institut fuer Gravitationsphysik, Leibniz Universitaet Hannover and Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institute), Callinstrasse 38, 30167 Hannover (Germany)
2. Department of Optics, Palacky University, 17 listopadu 50, 77200 Olomouc (Czech Republic)

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 purity of the shared state. Additionally, a positive secret key rate was obtained for two of the established channels.

• OSTI ID: 21011190
• Journal Information: Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.012323; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMMUNICATIONS
EIGENSTATES
GAUSSIAN PROCESSES
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM TELEPORTATION