The Schrodinger-like Equation for a Nonrelativistic Electron in a Photon Field of Arbitrary Intensity

Details The Schrodinger-like Equation for a Nonrelativistic Electron in a Photon Field of Arbitrary Intensity The Schrodinger-like Equation for a Nonrelativistic Electron in a Photon Field of Arbitrary Intensity

1998-06-04

arxiv.org/abs/physics/9806008v1

Physics

Atomic Physics

Tex file, 13 pages, no figure

Scientific paper

10.1103/PhysRevA.58.521

The ordinary Schrodinger equation with minimal coupling for a nonrelativistic electron interacting with a single-mode photon field is not satisfied by the nonrelativistic limit of the exact solutions to the corresponding Dirac equation. A Schrodinger-like equation valid for arbitrary photon intensity is derived from the Dirac equation without the weak-field assumption. The "eigenvalue" in the new equation is an operator in a Cartan subalgebra. An approximation consistent with the nonrelativistic energy level derived from its relativistic value replaces the "eigenvalue" operator by an ordinary number, recovering the ordinary Schrodinger eigenvalue equation used in the formal scattering formalism. The Schrodinger-like equation for the multimode case is also presented.

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