Vladimir Privman
Published 2002-05-08, updated 2004-11-28Version 2
We present a new short-time approximation scheme for evaluation of decoherence. At low temperatures, the approximation is argued to apply at intermediate times as well. It then provides a tractable approach complementary to Markovian-type approximations, and is appropriate for evaluation of deviations from pure states in quantum computing models.
Comments: 24 pages in plain TeX
Journal: J. Statistical Phys. 110, 957-970 (2003)
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