document: Exploiting randomness in quantum information processing 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
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extractive_keyphrases: quantum information processing randomness decoherence control quantum algorithms random switching noise stochastic control
abstractive_keyphrases: two-level system