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 1094-1622Full text not available in this repository. (Request a copy from the Strathclyde author)
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.
|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:||04 May 2016 15:10|