Spontaneous creation and persistence of ground-state coherence in a resonantly driven intra-cavity atomic ensemble
Abstract
The spontaneous creation and persistence of ground-state coherence in an ensemble of intracavity Rb atoms has been observed as a quantum beat. Our system realizes a quantum eraser, where the detection of a first photon prepares a superposition of ground-state Zeeman sublevels, while detection of a second erases the stored information. Beats appear in the time-delayed photon-photon coincidence rate (intensity correlation function). We study the beats theoretically and experimentally as a function of system parameters, and find them remarkably robust against perturbations such as spontaneous emission. Although beats arise most simply through single-atom-mediated quantum interference, scattering pathways involving pairs of atoms interfere also in our intracavity experiment. We present a detailed model which identifies all sources of interference and accounts for experimental realities such as imperfect pre-pumping of the atomic beam, cavity birefringence, and the transit of atoms across the cavity mode.
Keywords
Cite
@article{arxiv.1211.6364,
title = {Spontaneous creation and persistence of ground-state coherence in a resonantly driven intra-cavity atomic ensemble},
author = {D. G. Norris and A. D. Cimmarusti and L. A. Orozco and P. Barberis-Blostein and H. J. Carmichael},
journal= {arXiv preprint arXiv:1211.6364},
year = {2012}
}
Comments
35 pages, 14 figures