Time-dependent Maxwell field operators and field energy density for an atom near a conducting wall

Roberto Passante, Riccardo Messina, Ruggero Vasile, Riccardo Messina

Risultato della ricerca: Article

5 Citazioni (Scopus)

Abstract

We consider the time evolution of the electric and magnetic field operators for a two-level atom, interacting with the electromagnetic field, placed near an infinite perfectly conducting wall. We solve iteratively the Heisenberg equations for the field operators and obtain the electric and magnetic energy density operators around the atom (valid for any initial state). Then we explicitly evaluate them for an initial state with the atom in its bare ground state and the field in the vacuum state. We show that the results can be physically interpreted as the superposition of the fields propagating directly from the atom and the fields reflected on the wall. Relativistic causality in the field propagation is discussed. Finally we apply these results to the calculation of the dynamical Casimir-Polder interaction energy in the far zone between two atoms when a boundary condition such as a conducting wall is present. Magnetic contributions to the interatomic Casimir-Polder interaction in the presence of the wall are also considered. We show that in the limit of large times, the known results of the stationary case are recovered.
Lingua originaleEnglish
pagine (da-a)062106-1-062106-9
Numero di pagine9
RivistaDefault journal
Volume79
Stato di pubblicazionePublished - 2009

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flux density
conduction
operators
atoms
electromagnetic fields
interactions
boundary conditions
vacuum
ground state
propagation
electric fields
magnetic fields
energy

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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Time-dependent Maxwell field operators and field energy density for an atom near a conducting wall. / Passante, Roberto; Messina, Riccardo; Vasile, Ruggero; Messina, Riccardo.

In: Default journal, Vol. 79, 2009, pag. 062106-1-062106-9.

Risultato della ricerca: Article

Passante, Roberto ; Messina, Riccardo ; Vasile, Ruggero ; Messina, Riccardo. / Time-dependent Maxwell field operators and field energy density for an atom near a conducting wall. In: Default journal. 2009 ; Vol. 79. pagg. 062106-1-062106-9.
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