06 11 26 3 v 1 27 N ov 2 00 6 An environment-mediated quantum deleter

Environment-induced decoherence presents a great challenge to realizing a quantum computer. We point out the somewhat surprising fact that decoherence can be useful, indeed necessary, for practical quantum computation, in particular, for the effective erasure of quantum memory in order to initialize the state of the quantum computer. The essential point… CONTINUE READING