24 August 2004 Models of short-time qubit decoherence
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We compare approaches to evaluation of decoherence at low temperatures in two-state quantum systems weakly coupled to the environment. By analyzing an exactly solvable model, we demonstrate that a non-Markovian approximation scheme yields good quality estimates of the reduced density matrix for time scales appropriate for evaluation of quantum computing designs.
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Dmitry Solenov, Dmitry Solenov, Vladimir Privman, Vladimir Privman, } "Models of short-time qubit decoherence", Proc. SPIE 5436, Quantum Information and Computation II, (24 August 2004); doi: 10.1117/12.541458; https://doi.org/10.1117/12.541458

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