Semiclassical spin damping: Superradiance revisited

Details Semiclassical spin damping: Superradiance revisited Semiclassical spin damping: Superradiance revisited

1998-03-27

arxiv.org/abs/physics/9803041v1

Physics

Optics

12 pages standard revtex; to be published in EPJ D

Scientific paper

10.1007/s100530050126

A well known description of superradiance from pointlike collections of many atoms involves the dissipative motion of a large spin. The pertinent ``superradiance master equation'' allows for a formally exact solution which we subject to a semiclassical evaluation. The clue is a saddle-point approximation for an inverse Laplace transform. All previous approximate treatments, disparate as they may appear, are encompassed in our systematic formulation. A byproduct is a hitherto unknown rigorous relation between coherences and probabilities. Our results allow for generalizations to spin dynamics with chaos in the classical limit.

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