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  Experimental characterization of Gaussian quantum-communication channels

DiGuglielmo, J., Hage, B., Franzen, A., Fiurasek, J., & Schnabel, R. (2007). Experimental characterization of Gaussian quantum-communication channels. Physical Review. A, 76: 012323. doi:10.1103/PhysRevA.76.012323.

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DiGuglielmo, James1, Author           
Hage, Boris1, Author           
Franzen, Alexander, Author
Fiurasek, Jaromir, Author
Schnabel, Roman1, Author           
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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

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 Dates: 2010-04-222007
 Publication Status: Issued
 Pages: 9 pages
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevA.76.012323
arXiv: 0706.3269
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Title: Physical Review. A
  Alternative Title : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : Published by the American Physical Society through the American Institute of Physics
Pages: - Volume / Issue: 76 Sequence Number: 012323 Start / End Page: - Identifier: Other: 954925225012
Other: 1050-2947