QED for a Fibrillar Medium of Two-Level Atoms

Details QED for a Fibrillar Medium of Two-Level Atoms QED for a Fibrillar Medium of Two-Level Atoms

1996-04-17

arxiv.org/abs/hep-th/9604100v3

Phys.Rev. A56 (1997) 782

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 4 figures, uses harvmac and epsf. In this revised version, infra-red divergences are more properly handled

Scientific paper

10.1103/PhysRevA.56.782

We consider a fibrillar medium with a continuous distribution of two-level atoms coupled to quantized electromagnetic fields. Perturbation theory is developed based on the current algebra satisfied by the atomic operators. The one-loop corrections to the dispersion relation for the polaritons and the dielectric constant are computed. Renormalization group equations are derived which demonstrate a screening of the two-level splitting at higher energies. Our results are compared with known results in the slowly varying envelope and rotating wave approximations. We also discuss the quantum sine-Gordon theory as an approximate theory.

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