Van der Waals interaction and spontaneous decay of an excited atom in a superlens-type geometry

Details Van der Waals interaction and spontaneous decay of an excited atom in a superlens-type geometry Van der Waals interaction and spontaneous decay of an excited atom in a superlens-type geometry

2007-11-21

arxiv.org/abs/0711.3369v3

Physical Review A 78 (5), 053828 (2008)

Physics

Quantum Physics

10 Pages, 6 figures

Scientific paper

10.1103/PhysRevA.78.053828

Within the framework of macroscopic quantum electrodynamics, the resonant van der Waals potential experienced by an excited two-level atom near a planar magneto-electric two-layer system consisting of a slab of left-handed material and a perfect mirror is studied. It is shown that disregarding of material absorption leads to unphysical results, with divergent values for the potential away from the surface. Under appropriate conditions, the setup is found to feature a barrier near the surface which can be employed to levitate particles or used as a trapping or cooling mechanism. Finally, the problem of spontaneous decay [J. K\"{a}stel and M. Fleischhauer, Phys. Rev. A \textbf{68}, 011804(R) (2005)] is revisited. Disregarding of absorption is shown to drastically falsify the dependence on the atomic position of the decay rate.

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