Precision Measurement for Metastable Helium Atoms of the 413 nm Tune-Out Wavelength at Which the Atomic Polarizability Vanishes

Abstract

We present the first measurement for helium atoms of the tune-out wavelength at which the atomic polarizability vanishes. We utilise a novel, highly sensitive technique for precisely measuring the effect of variations in the trapping potential of confined metastable ($2^3{S}_1$) helium atoms illuminated by a perturbing laser light field. The measured tune-out wavelength of 413.0938($9_{Stat.}$)($20_{Syst.}$) nm compares well with the value predicted by a theoretical calculation (413.02(9) nm) which is sensitive to finite nuclear mass, relativistic, and quantum electro-dynamic (QED) effects. This provides motivation for more detailed theoretical investigations to test QED.

5 pages, 4 figures

References in corpus (4)

• High-precision determination of the electric and magnetic form factors of the proton
• Species-specific optical lattices
• Precision Measurement of Transition Matrix Elements via Light Shift Cancellation
• Magic wavelengths for the $2{}^{3}S\to 2{}^{1}S$ transition in helium

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• A simple 2 W continuous-wave laser system for trapping ultracold metastable helium atoms at the 319.8 nm magic wavelength
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• Ultracold homonuclear and heteronuclear collisions in metastable helium
• Lattice-depth measurement using multi-pulse atom diffraction in and beyond the weakly diffracting limit
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• Lattice-depth measurement using continuous grating atom diffraction
• Experimental study of tune-out wavelengths for spin-dependent optical lattice in ${}^{87}$Rb Bose-Einstein condensation
• Dissipationless tune-out trapping for a lanthanide-alkali quantum gas mixture
• Obtaining Atomic Matrix Elements from Vector Tune-Out Wavelengths using Atom Interferometry