GAUGE INVARIANT QED WITH ARBITRARY MIXING OF P.A AND Q.E INTERACTIONS

被引:24
作者
BAXTER, C
BABIKER, M
LOUDON, R
机构
[1] Department of Physics, University of Essex, Colchester
关键词
D O I
10.1080/09500349014550761
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The minimal-coupling Hamiltonian for a non-relativistic bound system of two charges in the dipole approximation is gauge transformed to a Hamiltonian of a variable gauge which mixes the usual p·A and q·E interactions, and re-scales the charges. Various photon transition processes-single photon absorption and emission; two-photon scattering and absorption; the Lamb shiftare investigated by perturbation theory and found to be gauge independent, providing the transitions occur on the energy shell. It is demonstrated how a particular choice of gauge removes the counter-rotating terms and diagonalises the Hamiltonian of a coupled oscillator and two-level atom. © 1990 Taylor & Francis Ltd.
引用
收藏
页码:685 / 699
页数:15
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