Prospects for application of ultracold Sr2 molecules in precision measurements
Genre
Journal ArticleDate
2009-01-05Author
Kotochigova, SZelevinsky, T
Ye, J
Subject
excited statesground states
molecular moments
molecule-photon collisions
optical lattices
rotational-vibrational states
spectral line broadening
Stark effect
strontium
transition moments
two-photon processes
vibrational states
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http://hdl.handle.net/20.500.12613/6079
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10.1103/PhysRevA.79.012504Abstract
Precision measurements with ultracold molecules require development of robust and sensitive techniques to produce and interrogate the molecules. With this goal, we theoretically analyze factors that affect frequency measurements between rovibrational levels of the Sr2 molecule in the electronic ground state. This measurement can be used to constrain the possible time variation of the proton-electron mass ratio. Sr2 is expected to be a strong candidate for achieving high precision due to the spinless nature and ease of cooling and perturbation-free trapping of Sr. The analysis includes calculations of two-photon transition dipole moments between deeply and weakly bound vibrational levels, lifetimes of intermediate excited states, and Stark shifts of the vibrational levels by the optical lattice field, including possibilities of Stark-cancellation trapping. © 2009 The American Physical Society.Citation to related work
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http://dx.doi.org/10.34944/dspace/6061