Enhanced Sensitivity to Fundamental Constants In Ultracold Atomic and Molecular Systems near Feshbach Resonances
- James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)
Scattering length, which can be measured in Bose-Einstein condensate and Feshbach molecule experiments, is extremely sensitive to the variation of fundamental constants, in particular, the electron-to-proton mass ratio (m{sub e}/m{sub p} or m{sub e}/{lambda}{sub QCD}, where {lambda}{sub QCD} is the QCD scale). Based on single- and two-channel scattering models, we show how the variation of the mass ratio propagates to the scattering length. Our results suggest that variation of m{sub e}/m{sub p} on the level of 10{sup -11}-10{sup -14} can be detected near a narrow magnetic or an optical Feshbach resonance by monitoring the scattering length on the 1% level. Derived formulas may also be used to estimate the isotopic shift of the scattering length.
- OSTI ID:
- 20777281
- Journal Information:
- Physical Review Letters, Vol. 96, Issue 23; Other Information: DOI: 10.1103/PhysRevLett.96.230801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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