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Decoherence in Quantum Walks on the Hypercube

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arxiv quant-ph/0501169 v5 pith:DNHCCUCM submitted 2005-01-28 quant-ph

Decoherence in Quantum Walks on the Hypercube

classification quant-ph
keywords decoherencequantumwalkshypercubeprovethresholdbehavebeneath
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study a natural notion of decoherence on quantum random walks over the hypercube. We prove that in this model there is a decoherence threshold beneath which the essential properties of the hypercubic quantum walk, such as linear mixing times, are preserved. Beyond the threshold, we prove that the walks behave like their classical counterparts.

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