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

Jacob A. Blackmore, Rahul Sawant, Philip D. Gregory, Sarah L. Bromley, Jesús Aldegunde, Jeremy M. Hutson, and Simon L. Cornish
Phys. Rev. A 102, 053316 – Published 17 November 2020

Abstract

We investigate the effects of static electric and magnetic fields on the differential ac Stark shifts for microwave transitions in ultracold bosonic Rb87Cs133 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.

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  • Received 3 July 2020
  • Accepted 15 September 2020

DOI:https://doi.org/10.1103/PhysRevA.102.053316

©2020 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Jacob A. Blackmore1,*, Rahul Sawant1,†, Philip D. Gregory1, Sarah L. Bromley1, Jesús Aldegunde2, Jeremy M. Hutson3,‡, and Simon L. Cornish1,§

  • 1Joint Quantum Centre (JQC) Durham-Newcastle, Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom
  • 2Departamento de Quimica Fisica, Universidad de Salamanca, 37008 Salamanca, Spain
  • 3Joint Quantum Centre (JQC) Durham-Newcastle, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom

  • *j.a.blackmore@durham.ac.uk
  • Present address: Midlands Ultracold Atom Research Centre, School of Physics and Astronomy, Birmingham University, Edgbaston Park Road, Birmingham B15 2TT, UK.
  • j.m.hutson@durham.ac.uk
  • §s.l.cornish@durham.ac.uk

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Issue

Vol. 102, Iss. 5 — November 2020

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