Dynamical Casimir-Polder interaction between an atom and a real surface

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We discuss the dynamical (i.e. time-dependent) Casimir-Polder force between a neutral atom and a real surface of arbitrary material, under non-equilibrium conditions. More specifically, we consider a polarisable neutral atom placed near a surface with arbitrary dielectric properties and we investigate the dynamical dressing and the consequent dynamical Casimir-Polder potential after the non-adiabatic (sudden) change of parameters involved in the atom-field coupling, such as the atomic transition frequency or the transition dipole moment. Using time-dependent perturbation theory and the matter-assisted field approach, we discuss how the physical properties of the real surface can influence the time dependence of the atom-wall Casimir-Polder potential, its intensity and sign, in different atom-wall distance regimes. We also show that the dynamical Casimir-Polder potential exhibits oscillations in time, yielding a transient repulsive force and that asymptotically settles to its stationary value. The physical relevance and the limits of validity of the results obtained are discussed.
Original languageEnglish
Number of pages1
Publication statusPublished - 2014


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