Testing qed by measuring a he∗ tune-out wavelength
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Authors
Henson, B. M.
Ross, J. A.
Thomas, K. F.
Kuhn, C. N.
Shin, D. K.
Hodgman, S. S.
Tang, Li Yan
Drake, G. W.F.
Truscott, A.
Baldwin, K. G.H.
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SPIE
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Abstract
We report a new measurement for the 413 nm tune-out wavelength for metastable helium (He∗); the optical wavelength at which the light does not interact with the atom, whose accurate determination provides a sensitive test of QED independent of transition energy measurements. Mitroy and Tang have shown[1] that the 413nm tune-out wavelength of the metastable 23S1 state of helium is particularly sensitive to QED effects, and a measurement of this tune-out to 175MHz accuracy would constitute the most precise measurement of transition rate information made in Helium.
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Book Title
AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
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