Precision spectroscopy with two correlated atoms

Details Precision spectroscopy with two correlated atoms Precision spectroscopy with two correlated atoms

2007-06-21

arxiv.org/abs/0706.3186v2

Appl. Phys. B 89, 483-488 (2007)

Physics

Quantum Physics

Scientific paper

10.1007/s00340-007-2867-4

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.

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