Extreme sub-wavelength atom localization via coherent population trapping

Details Extreme sub-wavelength atom localization via coherent population trapping Extreme sub-wavelength atom localization via coherent population trapping

2005-05-03

arxiv.org/abs/quant-ph/0505014v2

Physics

Quantum Physics

6 pages, 5 figures

Scientific paper

10.1088/0953-4075/39/17/002

We demonstrate an atom localization scheme based on monitoring of the atomic coherences. We consider atomic transitions in a Lambda configuration where the control field is a standing wave field. The probe field and the control field produce coherence between the two ground states. We show that this coherence has the same fringe pattern as produced by a Fabry-Perot interferometer and thus measurement of the atomic coherence would localize the atom. Interestingly enough the role of the cavity finesse is played by the ratio of the intensities of the pump and probe. This is in fact the reason for obtaining extreme subwavelenth localization. We suggest several methods to monitor the produced localization.

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