QED in arbitrary linear media: amplifying media
arXiv:0710.2867 · doi:10.1140/epjst/e2008-00740-9
Abstract
Recently, we have developed a unified approach to QED in arbitrary linearly responding media in equilibrium--media that give rise to absorption [Phys. Rev. A \textbf{75}, (2007) 053813]. In the present paper we show that, under appropriate conditions, the theory can be quite naturally generalized to amplifying media the effect of which is described within the framework of linear response theory. We discuss the limits of validity of the generalized theory and make contact with earlier quantization schemes suggested for the case of linearly and locally responding amplifying dielectric-type media. To illustrate the theory, we present the electromagnetic-field correlation functions that determine the Casimir force in the presence of amplifying media.
11 pages, submitted for publication in the European Physical Journal Special Topics, related to the CEWQO 2007 conference (June 2007, Palermo)
References in corpus (5)
- Quantum levitation by left-handed metamaterials
- QED commutation relations for inhomogeneous Kramers-Kronig dielectrics
- Casimir force acting on magnetodielectric bodies embedded in media
- Unified approach to QED in arbitrary linear media
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