Effective Operator Formalism in Optical Pumping
- 5 November 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 163 (1), 12-25
- https://doi.org/10.1103/physrev.163.12
Abstract
Real and virtual absorption of weak monochromatic light is analyzed with semiclassical radiation theory. The influence of the light on the atoms is described by an effective ground-state Hamiltonian operator, and the effect of the atoms on the light is described by a dielectric susceptibility operator. These operators are expressed explicitly in terms of familiar ground-state observables, angular factors, oscillator strengths, and plasma dispersion functions. The theory gives a comprehensive description of optical pumping, light shifts, and light modulation due to real and virtual absorption of light, and several new effects are predicted. Repopulation of the atomic ground state from a polarized excited state is not considered in this paper.Keywords
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