Models of Short-Time Qubit Decoherence

Details Models of Short-Time Qubit Decoherence Models of Short-Time Qubit Decoherence

2004-03-19

arxiv.org/abs/cond-mat/0403510v1

Proc. SPIE 5436, 172-186 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 3 figures

Scientific paper

10.1117/12.541458

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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