Controlling the ac Stark effect of RbCs with dc electric and magnetic fields

Blackmore, J. A.; Sawant, R.; Gregory, P. D.; Bromley, S. L.; Aldegunde, J.; Hutson, J. M.; Cornish, S. L.

Abstract

We investigate the effects of static electric and magnetic fields on the differential ac Stark shifts for microwave transitions in ultracold bosonic 87Rb133Cs molecules, for light of wavelength λ=1064nm. Near this wavelength we observe unexpected two-photon transitions that may cause trap loss. We measure the ac Stark effect in external magnetic and electric fields, using microwave spectroscopy of the first rotational transition. We quantify the isotropic and anisotropic parts of the molecular polarizability at this wavelength. We demonstrate that a modest electric field can decouple the nuclear spins from the rotational angular momentum, greatly simplifying the ac Stark effect. We use this simplification to control the ac Stark shift using the polarization angle of the trapping laser.

Citation

Blackmore, J. A., Sawant, R., Gregory, P. D., Bromley, S. L., Aldegunde, J., Hutson, J. M., & Cornish, S. L. (2020). Controlling the ac Stark effect of RbCs with dc electric and magnetic fields. Physical Review A, 102(5), Article 053316. https://doi.org/10.1103/physreva.102.053316

• Journal Article Type: Article
• Acceptance Date: Sep 15, 2020
• Online Publication Date: Nov 17, 2020
• Publication Date: 2020-11
• Deposit Date: Jul 20, 2020
• Publicly Available Date: Nov 20, 2020
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 102
• Issue: 5
• Article Number: 053316
• DOI: https://doi.org/10.1103/physreva.102.053316
• Public URL: https://durham-repository.worktribe.com/output/1266096
• Related Public URLs: https://arxiv.org/abs/2007.01762