Decoherence of Josephson charge qubit

Details Decoherence of Josephson charge qubit Decoherence of Josephson charge qubit

2005-06-06

arxiv.org/abs/quant-ph/0506044v4

Physica C 442 (2006) 79-83

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

10.1016/j.physc.2006.03.035

In this paper we investigate decoherence time of superconducting Josephson charge qubit (JCQ). Two kinds of methods, iterative tensor multiplication (ITM) method derived from the qusiadiabatic propagator path integral (QUAPI) and Bloch equations method are used. Using the non-Markovian ITM method we correct the decoherence time predicted by Bloch equations method. By comparing the exact theoretical result with the experimental data we suggest that the Ohmic noise plays the central role to the decoherence of the JCQ.

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