Controlling entanglement by direct quantum feedback
Quantum Physics
2009-11-13 v1
Abstract
We discuss the generation of entanglement between electronic states of two atoms in a cavity using direct quantum feedback schemes. We compare the effects of different control Hamiltonians and detection processes in the performance of entanglement production and show that the quantum-jump-based feedback proposed by us in Phys. Rev. A {\bf 76} 010301(R) (2007) can protect highly entangled states against decoherence. We provide analytical results that explain the robustness of jump feedback, and also analyse the perspectives of experimental implementation by scrutinising the effects of imperfections and approximations in our model.
Cite
@article{arxiv.0807.1144,
title = {Controlling entanglement by direct quantum feedback},
author = {A. R. R. Carvalho and A. J. S. Reid and J. J. Hope},
journal= {arXiv preprint arXiv:0807.1144},
year = {2009}
}
Comments
10 pages, 8 figures. To appear in PRA