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arXiv · 0902.3874

Casimir force on amplifying bodies

Agnes Sambale·Dirk-Gunnar Welsch·Stefan Yoshi Buhmann·Ho Trung Dung
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Abstract

Based on a unified approach to macroscopic QED that allows for the inclusion of amplification in a limited space and frequency range, we study the Casimir force as a Lorentz force on an arbitrary partially amplifying system of linearly locally responding (isotropic) magnetoelectric bodies. We demonstrate that the force on a weakly polarisable/magnetisable amplifying object in the presence of a purely absorbing environment can be expressed as a sum over the Casimir--Polder forces on the excited atoms inside the body. As an example, the resonant force between a plate consisting of a dilute gas of excited atoms and a perfect mirror is calculated.

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Agnes Sambale, Dirk-Gunnar Welsch, Stefan Yoshi Buhmann, Ho Trung Dung. 2009-02-23. Casimir force on amplifying bodies. https://doi.org/10.1134/s0030400x10030124

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