Inadequacy of perfect-reflector models in cavity QED for systems with low-frequency excitations

Eberlein, Claudia and Robaschik, Dieter (2004) Inadequacy of perfect-reflector models in cavity QED for systems with low-frequency excitations. Physical Review Letters, 92 (23). p. 233602. ISSN 0031-9007

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Abstract

It is shown that the model of perfectly reflecting boundaries widely employed in cavity QED is unsuitable for systems that have long-wavelength excitations. A prime example is a free charged particle near a reflecting wall. Modeling the wall as perfectly reflecting from the outset ignores evanescent waves that couple to the particle through virtual excitations at low energies, which can lead to errors in order of magnitude and even sign. The example of a free electron near an imperfectly reflecting wall characterized by a constant frequency-independent refractive index n is investigated in detail by determining its energy shift relative to an electron in vacuum through both nonrelativistic and relativistic calculations.

Item Type: Article
Additional Information: The paper shows that for some systems the cavity-QED model of a perfectly reflecting boundary does in fact not represent any experimentally realizable situation. The work was initiated by me and carried out in collaboration with a visiting guest professor from Germany.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Claudia Eberlein
Date Deposited: 06 Feb 2012 21:28
Last Modified: 14 Mar 2017 00:33
URI: http://sro.sussex.ac.uk/id/eprint/31394

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