Improving sensitivity to magnetic fields and electric dipole moments by using measurements of individual magnetic sublevels

Cheng Tang, Teng Zhang, David S. Weiss

Research output: Contribution to journalArticle

Abstract

We explore ways to use the ability to measure the populations of individual magnetic sublevels to improve the sensitivity of magnetic field measurements and measurements of atomic electric dipole moments (EDMs). When atoms are initialized in the m=0 magnetic sublevel, the shot-noise-limited uncertainty of these measurements is 1/2F(F+1) smaller than that of a Larmor precession measurement. When the populations in the even (or odd) magnetic sublevels are combined, we show that these measurements are independent of the tensor Stark shift and the second order Zeeman shift. We discuss the complicating effect of a transverse magnetic field and show that when the ratio of the tensor Stark shift to the transverse magnetic field is sufficiently large, an EDM measurement with atoms initialized in the superposition of the stretched states can reach the optimal sensitivity.

Original languageEnglish (US)
Article number033404
JournalPhysical Review A
Volume97
Issue number3
DOIs
StatePublished - Mar 8 2018

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electric moments
electric dipoles
dipole moments
dipoles
sensitivity
magnetic fields
shift
tensors
Larmor precession
shot noise
atoms

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "We explore ways to use the ability to measure the populations of individual magnetic sublevels to improve the sensitivity of magnetic field measurements and measurements of atomic electric dipole moments (EDMs). When atoms are initialized in the m=0 magnetic sublevel, the shot-noise-limited uncertainty of these measurements is 1/2F(F+1) smaller than that of a Larmor precession measurement. When the populations in the even (or odd) magnetic sublevels are combined, we show that these measurements are independent of the tensor Stark shift and the second order Zeeman shift. We discuss the complicating effect of a transverse magnetic field and show that when the ratio of the tensor Stark shift to the transverse magnetic field is sufficiently large, an EDM measurement with atoms initialized in the superposition of the stretched states can reach the optimal sensitivity.",
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Improving sensitivity to magnetic fields and electric dipole moments by using measurements of individual magnetic sublevels. / Tang, Cheng; Zhang, Teng; Weiss, David S.

In: Physical Review A, Vol. 97, No. 3, 033404, 08.03.2018.

Research output: Contribution to journalArticle

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