2002/07/31 by Chiu Fan Lee, Neil F. Johnson
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1016/s0375-9601(02)01088-5
published as Phys. Lett. A 301, 343 (2002) · 10 pages, final version
arxiv created 2002/08/19 · arxiv updated 2009/12/01
We consider how randomness can be made to play a useful role in quantum information processing - in particular, for decoherence control and the implementation of quantum algorithms. For a two-level system in which the decoherence channel is non-dissipative, we show that decoherence suppression is possible if memory is present in the channel. Random switching between two potentially harmful noise sources can then provide a source of stochastic control. Such random switching can also be used in an advantageous way for the implementation of quantum algorithms.