Robust transmission of non-Gaussian entanglement over optical fibers

Journal Article · Fri Dec 15 00:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.062303· OSTI ID:20976432

Biswas, Asoka ^[1]; Lidar, Daniel A ^[1]

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1. Department of Chemistry, University of Southern California, Los Angeles, California 90089 (United States)

We show how the entanglement in a wide range of continuous variable non-Gaussian states can be preserved against decoherence for long-range quantum communication through an optical fiber. We apply protection via decoherence-free subspaces and quantum dynamical decoupling to this end. The latter is implemented by inserting phase shifters at regular intervals {delta} inside the fiber, where {delta} is roughly the ratio of the speed of light in the fiber to the bath high-frequency cutoff. Detailed estimates of relevant parameters are provided using the boson-boson model of system-bath interaction for silica fibers and {delta} is found to be on the order of a millimeter.

• OSTI ID: 20976432
• Journal Information: Physical Review. A, Vol. 74, Issue 6; Other Information: DOI: 10.1103/PhysRevA.74.062303; (c) 2006 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
GAUSS FUNCTION
INFORMATION THEORY
INTERACTIONS
OPTICAL FIBERS
PHASE SHIFT
QUANTUM COMPUTERS
QUANTUM DECOHERENCE
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
SAFETY