Instituto de Ciencia de Materiales de Madrid
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Coherence control for qubits

Karen M. Fonseca-Romero, Sigmund Kohler, and Peter Hänggi
Chem. Phys. 296, 307 (2004)

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 tunnelling 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.

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 18.6.2018 by Sigmund Kohler