Coherence control for qubits
Quantum Physics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.quant-ph/0307236,
title = {Coherence control for qubits},
author = {Karen M. Fonseca-Romero and Sigmund Kohler and Peter Hänggi},
journal= {arXiv preprint arXiv:quant-ph/0307236},
year = {2007}
}
Comments
15 pages, 1 figure