Westerberg, N. , Messinger, A. and Barnett, S. M. (2022) Duality, decay rates, and local-field models in macroscopic QED. Physical Review A: Atomic, Molecular and Optical Physics, 105(5), 053704. (doi: 10.1103/PhysRevA.105.053704)
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Abstract
Any treatment of magnetic interactions between atoms, molecules, and optical media must start at the form of the interaction energy. This forms the base on which predictions about any number of magnetic atom-light properties stands, spontaneous decay rates and forces included. As is well known, the Heaviside-Larmor duality symmetry of Maxwell's equations, where electric and magnetic quantities are exchanged, is broken by the usual form of the magnetic interaction energy. We argue that this symmetry can be restored by including general local-field effects and that local fields should be treated as a necessity for correctly translating between the microscopic world of the dipole and the macroscopic world of the measured fields. This may additionally aid in resolving a long-standing debate over the form of the force on a dipole in a medium. Finally, we compute the magnetic dipole decay rate in a magnetodielectric with local-field effects taken into account and show that macroscopic quantum electrodynamics can be made to be dual symmetric at an operator level, instead of only for expectation values.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Barnett, Professor Stephen and Messinger, Ms Anette and Westerberg, Dr Niclas |
| Authors: | Westerberg, N., Messinger, A., and Barnett, S. M. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review A: Atomic, Molecular and Optical Physics |
| Publisher: | American Physical Society |
| ISSN: | 1050-2947 |
| ISSN (Online): | 1094-1622 |
| Published Online: | 04 May 2022 |
| Copyright Holders: | Copyright © 2022 American Physical Society |
| First Published: | First published in Physical Review A: Atomic, Molecular and Optical Physics 105(5): 053704 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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