Noise-enhanced classical and quantum capacities in communication networks

Details Noise-enhanced classical and quantum capacities in communication networks Noise-enhanced classical and quantum capacities in communication networks

2010-03-30

arxiv.org/abs/1003.5877v1

Phys. Rev. Lett. 105, 190501 (2010)

Physics

Quantum Physics

4 pages, 4 figures; See Video Abstract at http://www.quantiki.org/video_abstracts/10035877

Scientific paper

10.1103/PhysRevLett.105.190501

The unavoidable presence of noise is thought to be one of the major problems to solve in order to pave the way for implementing quantum information technologies in realistic physical platforms. However, here we show a clear example in which noise, in terms of dephasing, may enhance the capability of transmitting not only classical but also quantum information, encoded in quantum systems, through communication networks. In particular, we find analytically and numerically the quantum and classical capacities for a large family of quantum channels and show that these information transmission rates can be strongly enhanced by introducing dephasing noise in the complex network dynamics.

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