Short-time decoherence of Josephson charge qubits in Ohmic and 1/f noise environment

Details Short-time decoherence of Josephson charge qubits in Ohmic and 1/f noise environment Short-time decoherence of Josephson charge qubits in Ohmic and 1/f noise environment

2005-03-17

arxiv.org/abs/quant-ph/0503155v1

Physica C 432 (2005) 231-238

Physics

Quantum Physics

7 pages, 3 figures

Scientific paper

10.1016/j.physc.2005.08.012

In this paper we investigate the short-time decoherence from Ohmic and 1/f noise of single Josephson charge qubit (JCQ). At first, we use the short-time approximation to obtain the dynamics of the open JCQ. Then we calculate the decoherence the measure of which is chosen as the maximum norm of the deviation density operator. It is shown that the decoherence from 1/f noise plays the central role. The total decoherence from Ohmic and 1/f noise is serious at present experiential conditions according to the DiVincenzo criterion.

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