Physics – Quantum Physics
Scientific paper
2004-06-29
Optics and Spectroscopy (USSR) 99 (3), 466 (2005)
Physics
Quantum Physics
14 pages, 2 figures, presented at: X International Conference on Quantum Optics, Minsk, Belarus, May 30 - June 3, 2004
Scientific paper
10.1134/1.2055945
Based on macroscopic QED in linear, causal media, we present a consistent theory for the Casimir-Polder force acting on an atom positioned near dispersing and absorbing magnetodielectric bodies. The perturbative result for the van-der-Waals energy is shown to exhibit interesting new features in the presence of magnetodielectric bodies. To go beyond perturbation theory, we start with the center-of-mass equation of motion and derive a dynamical expression for the Casimir-Polder force acting on an atom prepared in an arbitrary electronic state. For a non-driven atom in the weak coupling regime, the force as a function of time is shown to be a superposition of force components that are related to the electronic density matrix elements at chosen time. These force components depend on the position-dependent polarizability of the atom that correctly accounts for the body-induced level shifts and broadenings.
Buhmann Stefan Yoshi
Dung Ho Trung
Kampf Thomas
Knoll Ludwig
Welsch Dirk-Gunnar
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