Autofeedback scheme for preservation of macroscopic coherence in microwave cavities
Quantum Physics
2009-10-31 v2
Abstract
We present a scheme for controlling the decoherence of a linear superposition of two coherent states with opposite phases in a high-Q microwave cavity, based on the injection of appropriately prepared ``probe'' and ``feedback'' Rydberg atoms, improving the one presented in [D. Vitali et al., Phys. Rev. Lett. 79, 2442 (1997)]. In the present scheme, the information transmission from the probe to the feedback atom is directly mediated by a second auxiliary cavity. The detection efficiency for the probe atom is no longer a critical parameter, and the decoherence time of the superposition state can be significantly increased using presently available technology.
Keywords
Cite
@article{arxiv.quant-ph/9902071,
title = {Autofeedback scheme for preservation of macroscopic coherence in microwave cavities},
author = {M. Fortunato and J. M. Raimond and P. Tombesi and D. Vitali},
journal= {arXiv preprint arXiv:quant-ph/9902071},
year = {2009}
}
Comments
revtex, 15 pages, 4 eps figures