Magic frequencies in atom-light interaction for precision probing of the density matrix

Menachem Givon; Yair Margalit; Amir Waxman; Tal David; David Groswasser; Yonathan Japha; Ron Folman

doi:10.1103/PhysRevLett.111.053004

Magic frequencies in atom-light interaction for precision probing of the density matrix

Menachem Givon, Yair Margalit, Amir Waxman, Tal David, David Groswasser, Yonathan Japha, Ron Folman

Department of Physics

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3 Scopus citations

Abstract

We analyze theoretically and experimentally the existence of a magic frequency for which the absorption of a linearly polarized light beam by a vapor of alkali-metal atoms is independent of the population distribution among the Zeeman sublevels and the angle between the beam and a magnetic field. The phenomenon originates from a peculiar cancellation of the contributions of higher moments of the atomic density matrix, and is described using the Wigner-Eckart theorem and inherent properties of Clebsch-Gordan coefficients. One important application is the robust measurement of the hyperfine population.

Original language	English
Article number	053004
Journal	Physical Review Letters
Volume	111
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.111.053004
State	Published - 1 Aug 2013

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.111.053004

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abstract = "We analyze theoretically and experimentally the existence of a magic frequency for which the absorption of a linearly polarized light beam by a vapor of alkali-metal atoms is independent of the population distribution among the Zeeman sublevels and the angle between the beam and a magnetic field. The phenomenon originates from a peculiar cancellation of the contributions of higher moments of the atomic density matrix, and is described using the Wigner-Eckart theorem and inherent properties of Clebsch-Gordan coefficients. One important application is the robust measurement of the hyperfine population.",

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AU - Givon, Menachem

AU - Margalit, Yair

AU - Waxman, Amir

AU - David, Tal

AU - Groswasser, David

AU - Japha, Yonathan

AU - Folman, Ron

PY - 2013/8/1

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N2 - We analyze theoretically and experimentally the existence of a magic frequency for which the absorption of a linearly polarized light beam by a vapor of alkali-metal atoms is independent of the population distribution among the Zeeman sublevels and the angle between the beam and a magnetic field. The phenomenon originates from a peculiar cancellation of the contributions of higher moments of the atomic density matrix, and is described using the Wigner-Eckart theorem and inherent properties of Clebsch-Gordan coefficients. One important application is the robust measurement of the hyperfine population.

AB - We analyze theoretically and experimentally the existence of a magic frequency for which the absorption of a linearly polarized light beam by a vapor of alkali-metal atoms is independent of the population distribution among the Zeeman sublevels and the angle between the beam and a magnetic field. The phenomenon originates from a peculiar cancellation of the contributions of higher moments of the atomic density matrix, and is described using the Wigner-Eckart theorem and inherent properties of Clebsch-Gordan coefficients. One important application is the robust measurement of the hyperfine population.

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Magic frequencies in atom-light interaction for precision probing of the density matrix

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