Comment on: Magnetic field measurements in Rb vapor by splitting Hanle resonances under the presence of a perpendicular scanning magnetic field
1 Department of Physics, University of Fribourg, Chemin du Musée 3, 1700 Fribourg, Switzerland
2 Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, P.R. China
Received: 9 December 2016
Received in final form: 10 February 2017
Published online: 4 April 2017
In a recent article in this journal Grewal and Pattabiraman reported on the splitting of ground state Hanle resonances (recorded with linearly polarized light) by a transverse field. They claimed a “linearly proportional” dependence on the transverse field strength and supported this observation with results from numerical simulations. In this comment we argue that the splitting occurs only beyond a certain threshold field value and that it has a strong non-linearity near threshold. We base this claim on our previously published algebraic expressions for the line shapes and support this by experimental evidence.
Key words: Atomic Physics
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