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Linear polarizabilities of two- and three-level atoms

Milonni, P.W. and Loudon, Rodney and Berman, P.R. and Barnett, S.M. (2008) Linear polarizabilities of two- and three-level atoms. Physical Review A, 77 (4). 043835. ISSN 1050-2947

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Abstract

Different expressions for the linear polarizability of a two-level atom with radiative corrections have been derived recently. We show that an expression said to differ from that obtained by the present authors is in fact consistent with it. The same-sign and opposite-sign prescriptions for linewidths are revisited with respect to the polarizability, the scattering amplitude, and the optical theorem. Both prescriptions represent approximations to more general expressions in the two-level case, and neither is correct for transitions between excited atomic states, as we demonstrate by calculating the linear polarizability of a three-level atom.

Item type: Article
ID code: 19688
Keywords: optical susceptibility, atomic moments, line shape, line width, photon-atom interactions, linear polarizability, radiative correction, Physics, Atomic and Molecular Physics, and Optics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Depositing user: Strathprints Administrator
Date Deposited: 08 Jun 2010 08:53
Last modified: 21 May 2015 11:45
URI: http://strathprints.strath.ac.uk/id/eprint/19688

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