PhysRevA.88.012107.pdf (804.67 kB)
Anomalous magnetic moment of an electron near a dispersive surface
journal contribution
posted on 2023-06-08, 06:49 authored by Claudia Eberlein, Robert BennettChanges in the magnetic moment of an electron near a dielectric or conducting surface due to boundary-dependent radiative corrections are investigated. The electromagnetic field is quantized by normal mode expansion for a nondispersive dielectric and an undamped plasma, but the electron is described by the Dirac equation without matter-field quantization. Perturbation theory in the Dirac equation leads to a general formula for the magnetic-moment shift in terms of integrals over products of electromagnetic mode functions. In each of the models investigated, contour integration techniques over a complex wave vector can be used to derive a general formula featuring just integrals over transverse electric and transverse magnetic reflection coefficients of the surface. Analysis of the magnetic-moment shift for several classes of materials yields markedly different results from the previously considered simplistic “perfect-reflector” model, due to the inclusion of physically important features of the electromagnetic response of the surface such as evanescent field modes and dispersion in the material. For a general dispersive dielectric surface, the magnetic-moment shift of a nearby electron can exceed the previous prediction of the perfect-reflector model by several orders of magnitude.
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Physical Review AISSN
1050-2947Publisher
American Physical SocietyExternal DOI
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88Page range
012107Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
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2014-05-01First Open Access (FOA) Date
2014-05-01First Compliant Deposit (FCD) Date
2014-05-01Usage metrics
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