Ultracold molecules: new probes on the variation of fundamental constants

Details Ultracold molecules: new probes on the variation of fundamental constants Ultracold molecules: new probes on the variation of fundamental constants

2009-01-24

arxiv.org/abs/0901.3846v1

New Journal of Physics 11 055048 (2009)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1088/1367-2630/11/5/055048

Ultracold molecules offer brand new opportunities to probe the variation of fundamental constants with unprecedented sensitivity. This paper summarizes theoretical background and current constraints on the variation of fine structure constant and electron-to-proton mass ratio, as well as proposals and experimental efforts to measure the variations based on ultracold molecules. In particular, we describe two novel spectroscopic schemes on ultracold molecules which have greatly enhanced sensitivity to fundamental constants: resonant scattering near Feshbach resonances and spectroscopy on close-lying energy levels of ultracold molecules.

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