The electromagnetic field fluctuations in the vacuum state are considered in the region external to a half-space filled with a homogeneous non-dissipative dielectric. We discuss the appropriate limits to a real and an ideal metal, focusing on the renormalized field fluctuations (equivalent to energy densities) in the proximity of the dielectric-vacuum interface. We show that, whereas in presence of a real conductor the renormalized field fluctuations are finite in any point of space, surface divergences appear at the interface in the ideal conductor limit. The main features of such divergences are discussed in detail. We point out that the behavior of field fluctuations close to the interface can be investigated through the retarded Casimir-Polder interaction with an appropriate polarizable body.

Bartolo, N., Passante, R. (2012). Electromagnetic field fluctuations near a dielectric half-space and appearance of surface divergences in the ideal conductor limit. In 6th International Workshop Lyon BEC 2012. Theory of Quantum Gases and Quantum Coherence... Book of abstracts (pp.33-33).

Electromagnetic field fluctuations near a dielectric half-space and appearance of surface divergences in the ideal conductor limit

PASSANTE, Roberto
2012-01-01

Abstract

The electromagnetic field fluctuations in the vacuum state are considered in the region external to a half-space filled with a homogeneous non-dissipative dielectric. We discuss the appropriate limits to a real and an ideal metal, focusing on the renormalized field fluctuations (equivalent to energy densities) in the proximity of the dielectric-vacuum interface. We show that, whereas in presence of a real conductor the renormalized field fluctuations are finite in any point of space, surface divergences appear at the interface in the ideal conductor limit. The main features of such divergences are discussed in detail. We point out that the behavior of field fluctuations close to the interface can be investigated through the retarded Casimir-Polder interaction with an appropriate polarizable body.
Settore FIS/03 - Fisica Della Materia
7-giu-2012
6th International Workshop Lyon BEC 2012. Theory of Quantum Gases and Quantum Coherence.
Lyon, France
5-8 June 2012
1
Bartolo, N., Passante, R. (2012). Electromagnetic field fluctuations near a dielectric half-space and appearance of surface divergences in the ideal conductor limit. In 6th International Workshop Lyon BEC 2012. Theory of Quantum Gases and Quantum Coherence... Book of abstracts (pp.33-33).
Proceedings (atti dei congressi)
Bartolo, N; Passante, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/63334
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