P. K. Molony
Measurement of the binding energy of ultracold 87Rb133Cs molecules using an offset-free optical frequency comb
Molony, P. K.; Kumar, A.; Gregory, P. D.; Kliese, R.; Puppe, T.; Le Sueur, C. R.; Aldegunde, J.; Hutson, J. M.; Cornish, S. L.
Authors
A. Kumar
P. D. Gregory
R. Kliese
T. Puppe
Ruth Le Sueur c.r.lesueur@durham.ac.uk
Research Fellow
J. Aldegunde
Professor Jeremy Hutson j.m.hutson@durham.ac.uk
Professor
Professor Simon Cornish s.l.cornish@durham.ac.uk
Professor
Abstract
We report the binding energy of Rb87Cs133 molecules in their rovibrational ground state measured using an offset-free optical frequency comb based on difference frequency generation technology. We create molecules in the absolute ground state using stimulated Raman adiabatic passage (STIRAP) with a transfer efficiency of 88%. By measuring the absolute frequencies of our STIRAP lasers, we find the energy-level difference from an initial weakly bound Feshbach state to the rovibrational ground state with a resolution of ∼5 kHz over an energy-level difference of more than 114THz; this lets us discern the hyperfine splitting of the ground state. Combined with theoretical models of the Feshbach-state binding energies and ground-state hyperfine structure, we determine a zero-field binding energy of h×114268135.24(4)(3)MHz. To our knowledge, this is the most accurate determination to date of the dissociation energy of a molecule.
Citation
Molony, P. . K., Kumar, A., Gregory, P. . D., Kliese, R., Puppe, T., Le Sueur, C. . R., Aldegunde, J., Hutson, J. . M., & Cornish, S. . L. (2016). Measurement of the binding energy of ultracold 87Rb133Cs molecules using an offset-free optical frequency comb. Physical Review A, 94(2), Article 022507. https://doi.org/10.1103/physreva.94.022507
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 29, 2016 |
Online Publication Date | Aug 15, 2016 |
Publication Date | Aug 15, 2016 |
Deposit Date | Aug 31, 2016 |
Publicly Available Date | Aug 31, 2016 |
Journal | Physical Review A |
Print ISSN | 2469-9926 |
Electronic ISSN | 2469-9934 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 94 |
Issue | 2 |
Article Number | 022507 |
DOI | https://doi.org/10.1103/physreva.94.022507 |
Public URL | https://durham-repository.worktribe.com/output/1377237 |
Related Public URLs | https://arxiv.org/abs/1605.08557 |
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Copyright Statement
Reprinted with permission from the American Physical Society: Molony, P.K. and Kumar, A. and Gregory, P.D. and Kliese, R. and Puppe, T. and Le Sueur, C.R. and Aldegunde, J. and Hutson, J.M. and Cornish, S.L. (2016) 'Measurement of the binding energy of ultracold 87Rb133Cs molecules using an offset-free optical frequency comb.', Physical review A., 94 (2). 022507 © 2016 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
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