Fiber Optics and Optical Communication

Long-distance quantum communications with superactivated Gaussian optical quantum channels

[+] Author Affiliations
Laszlo Gyongyosi

Budapest University of Technology and Economics, Department of Telecommunications, Magyar tudosok krt. 2H-1111 Budapest, Hungary

Sandor Imre

Budapest University of Technology and Economics, Department of Telecommunications, Magyar tudosok krt. 2H-1111 Budapest, Hungary

Opt. Eng. 51(1), 015003 (Feb 06, 2012). doi:10.1117/1.OE.51.1.015003
History: Received August 15, 2011; Revised November 18, 2011; Accepted November 18, 2011
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Abstract.  The superactivation of zero-capacity optical quantum channels makes it possible to use two zero-capacity optical quantum channels, with a positive joint capacity at the output. Here we show, that noisy Gaussian quantum channels with the help of entanglement and coherent optical devices, can be used to transmit quantum information perfectly. It will be demonstrated that using the superactivation effect, it is possible to develop efficient quantum repeaters with the elimination of the very inefficient and expensive purification process.

© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Laszlo Gyongyosi and Sandor Imre
"Long-distance quantum communications with superactivated Gaussian optical quantum channels", Opt. Eng. 51(1), 015003 (Feb 06, 2012). ; http://dx.doi.org/10.1117/1.OE.51.1.015003


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