Cavity QED nondemolition measurement scheme using quantized atomic motion
Quantum Physics
2009-11-13 v2
Abstract
Considering ultracold atoms traversing a high-Q Fabry-Perot cavity, we theoretically demonstrate a quantum nondemolition measurement of the photon number. This fully quantum mechanical approach may be understood utilizing concepts as effective mass and group velocity of the atom. The various photon numbers induce a splitting of the atomic wave packet, and a time-of-flight measurement of the atom thereby reveals the photon number. While repeated atomic measurements increase the efficiency of the protocol, it is shown that by considering long interaction times only a few atoms are needed to resolve the photon number with almost perfect accuracy.
Cite
@article{arxiv.0909.1958,
title = {Cavity QED nondemolition measurement scheme using quantized atomic motion},
author = {Jonas Larson and Mahmoud Abdel-Aty},
journal= {arXiv preprint arXiv:0909.1958},
year = {2009}
}
Comments
7 pages, 7 figures. Final version to appear in Phys. Rev. A