Coherence control for qubits

Details Coherence control for qubits Coherence control for qubits

2003-07-31

arxiv.org/abs/quant-ph/0307236v1

Chem. Phys. 296, 307 (2004)

Physics

Quantum Physics

15 pages, 1 figure

Scientific paper

10.1016/j.chemphys.2003.09.015

We study the influence of an external driving field on the coherence properties of a qubit under the influence of bit-flip noise. In the presence of driving, two paradigmatic cases are considered: (i) a field that results for a suitable choice of the parameters in so-called coherent destruction of tunneling and (ii) one that commutes with the static qubit Hamiltonian. In each case, we give for high-frequency driving a lower bound for the coherence time. This reveals the conditions under which the external fields can be used for coherence stabilization.

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