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Hyperfine structure in the microwave spectra of ultracold polar molecules

Ran, Hong; Aldegunde, J.; Hutson, Jeremy M.

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Authors

Hong Ran

J. Aldegunde



Abstract

We investigate the microwave spectra of ultracold alkali metal dimers in magnetic, electric and combined fields taking into account the hyperfine structure due to nuclear spins. We consider the molecules 41K87Rb and 7Li133Cs, which are the targets of current experiments, and demonstrate two extremes of large and small nuclear quadrupole couplings. We calculate the frequencies and intensities of transitions that may be used to transfer ultracold molecules between hyperfine states in a magnetic field, employing different polarizations of microwave radiation. In an electric field, the hyperfine levels display narrow avoided crossings at specific fields that we explain in terms of molecular alignment. The hyperfine splittings that arise in electric fields may hinder individual addressing in schemes that use ultracold molecules in quantum computation, but the structure of the spectra is suppressed in combined fields.

Citation

Ran, H., Aldegunde, J., & Hutson, J. M. (2010). Hyperfine structure in the microwave spectra of ultracold polar molecules. New Journal of Physics, 12, Article 043015. https://doi.org/10.1088/1367-2630/12/4/043015

Journal Article Type Article
Publication Date Apr 1, 2010
Deposit Date Jun 19, 2013
Publicly Available Date Mar 28, 2024
Journal New Journal of Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 12
Article Number 043015
DOI https://doi.org/10.1088/1367-2630/12/4/043015

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Accepted Journal Article (729 Kb)
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Copyright Statement
© 2010 IOP Publishing




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