Spatial correlations of vacuum fluctuations and the Casimir-Polder potential

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Abstract

We calculate the Casimir-Polder intermolecular potential using an effective Hamiltonian recently introduced. We show that the potential can be expressed in terms of the dynamical polarizabilities of the two atoms and the equal-time spatial correlation of the electric field in the vacuum state. This gives support to an interesting physical model recently proposed in the literature, where the potential is obtained from the classical interaction between the instantaneous atomic dipoles induced and correlated by the vacuum fluctuations. Also, the results obtained suggest a more general validity of this intuitive model, for example, when external boundaries or thermal fields are present. © 2003 Elsevier B.V. All rights reserved.

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Passante, R., Persico, F., & Rizzuto, L. (2003). Spatial correlations of vacuum fluctuations and the Casimir-Polder potential. Physics Letters, Section A: General, Atomic and Solid State Physics, 316(1–2), 29–32. https://doi.org/10.1016/S0375-9601(03)01131-9

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