Precision spectroscopy with two correlated atoms
Quantum Physics
2011-11-10 v2 Atomic Physics
Abstract
We discuss techniques that allow for long coherence times in laser spectroscopy experiments with two trapped ions. We show that for this purpose not only entangled ions prepared in decoherence-free subspaces can be used but also a pair of ions that are not entangled but subject to the same kind of phase noise. We apply this technique to a measurement of the electric quadrupole moment of the 3d D5/2 state of 40Ca+ and to a measurement of the linewidth of an ultrastable laser exciting a pair of 40Ca+ ions.
Cite
@article{arxiv.0706.3186,
title = {Precision spectroscopy with two correlated atoms},
author = {M. Chwalla and K. Kim and T. Monz and P. schindler and M. Riebe and C. F. Roos and R. Blatt},
journal= {arXiv preprint arXiv:0706.3186},
year = {2011}
}