Coherent communication with continuous quantum variables

Journal Article · Fri Jun 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.060303· OSTI ID:20991052

Wilde, Mark M ^[1]; Krovi, Hari; Brun, Todd A ^[2]

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1. Signal and Image Processing Institute, Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089 (United States)
2. Communication Sciences Institute, Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089 (United States)

The coherent bit (cobit) channel is a resource intermediate between classical and quantum communication. It produces coherent versions of teleportation and superdense coding. We extend the cobit channel to continuous variables by providing a definition of the coherent nat (conat) channel. We construct several coherent protocols that use both a position-quadrature and a momentum-quadrature conat channel with finite squeezing. Finally, we show that the quality of squeezing diminishes through successive compositions of coherent teleportation and superdense coding.

• OSTI ID: 20991052
• Journal Information: Physical Review. A, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevA.75.060303; (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
INFORMATION THEORY
QUADRATURES
QUANTUM COMPUTERS
QUANTUM MECHANICS
QUANTUM TELEPORTATION