Dynamical Casimir-Polder interaction between an atom and surface plasmons

Salvatore Spagnolo, Lucia Rizzuto, Roberto Passante, Harald R. Haakh, Carsten Henkel

Risultato della ricerca: Articlepeer review

14 Citazioni (Scopus)

Abstract

We investigate the time-dependent Casimir-Polder potential of a polarizable two-level atom placed near a surface of arbitrary material, after a sudden change in the parameters of the system. Different initial conditions are taken into account. For an initially bare ground-state atom, the time-dependent Casimir-Polderenergy reveals how the atom is ''being dressed'' by virtual, matter-assisted photons. We also study the transient behavior of the Casimir-Polder interaction between the atom and the surface starting from a partially dressed state, after an externally induced change in the atomic level structure or transition dipoles.The Heisenberg equations are solved through an iterative technique for both atomic and field operators in the medium-assisted electromagnetic field quantization scheme. We analyze, in particular, how the time evolution of the interaction energy depends on the optical properties of the surface, in particular on the dispersion relationof surface plasmon polaritons. The physical significance and the limits of validity of the obtained results are discussed in detail.
Lingua originaleEnglish
pagine (da-a)022509-1-022509-11
Numero di pagine11
RivistaPHYSICAL REVIEW A
Volume89
Stato di pubblicazionePublished - 2014

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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