Gauge independent Wigner function and the laser radiation pressure

Piotr Badziag

Physica A: Statistical Mechanics and its Applications, 1986, vol. 135, issue 1, 271-280

Abstract: An analysis of atomic motion in electromagnetic field using gauge independent Wigner function formalism is presented and the expression for the radiation pressure force is rederived using multipole expansion of terms in equations of motion rather than in the interaction Hamiltonian. The lowest order result is then compared with the expression for the radiation pressure force based on E · d approximation of the interaction Hamiltonian. The comparison shows that our approach is more consistent than the standard approach. This is due to the fact that the equation governing the motion of the atomic mass centre does not depend on the Hamiltonian itself but on its derivatives.

Date: 1986
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:135:y:1986:i:1:p:271-280

DOI: 10.1016/0378-4371(86)90118-4

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