Coherence control for qubits
Abstract
We study the influence of an external driving field on the coherence properties of a qubit subject to 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.
- Publication:
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Chemical Physics
- Pub Date:
- January 2004
- DOI:
- 10.1016/j.chemphys.2003.09.015
- arXiv:
- arXiv:quant-ph/0307236
- Bibcode:
- 2004CP....296..307F
- Keywords:
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- Quantum Physics
- E-Print:
- 15 pages, 1 figure