All linear optical quantum memory based on quantum error correction |
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Authors: | Gingrich Robert M Kok Pieter Lee Hwang Vatan Farrokh Dowling Jonathan P |
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Institution: | Quantum Computing Technologies Group, Section 367, California Institute of Technology, MS 126-347, 4800 Oak Grove Drive, California 91109-8099, USA. |
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Abstract: | When photons are sent through a fiber as part of a quantum communication protocol, the error that is most difficult to correct is photon loss. Here we propose and analyze a two-to-four qubit encoding scheme, which can recover the loss of one qubit in the transmission. This device acts as a repeater, when it is placed in series to cover a distance larger than the attenuation length of the fiber, and it acts as an optical quantum memory, when it is inserted in a fiber loop. We call this dual-purpose device a "quantum transponder." |
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