Measurement and extinction of vector light shifts using interferometry of spinor condensates

Abstract

We use differential Ramsey interferometry of ultracold atoms to characterize the vector light shift (VLS) from a far-off resonance optical dipole trap at $\lambda =1064\mathrm{nm}$. The VLS manifests as a `fictitious' magnetic field, which we perceive as a change in the Larmor frequency of two spinor condensates exposed to different intensities of elliptically polarized light. We use our measurement scheme to diagnose the light-induced magnetic field and suppress it to $2.1(8)\times 10^{-4}$ of its maximum value, by making the trapping light linearly polarized with a quarter-wave plate in each beam. Our sensitive measurement of the VLS-induced field demonstrates high-precision, in-vacuo interferometric polarimetry of dipole trapping light and can be adapted to measure vector shifts from other lasers, advancing the application of optically trapped atoms to precision metrology.

arXiv comment12 pages, 6 figures

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Cited by in corpus (6)

• Mapping the absolute magnetic field and evaluating the quadratic Zeeman effect induced systematic error in an atom interferometer gravimeter
• Observation of vector and tensor light shifts in 87Rb using near-resonant, stimulated Raman spectroscopy
• Magic-wavelength Faraday probe measures spin continuously and without light shifts
• In-situ measurement of light polarization with ellipticity-induced nonlinear magneto-optical rotation
• Light ellipticity and polarization angle dependence of magnetic resonances in rubidium vapor using amplitude-modulated light: Theoretical and experimental investigations
• Quantum lock-in detection of a vector light shift