Resonance interaction between one excited and one ground state atom |
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Authors: | M Boström JJ Longdell DJ Mitchell BW Ninham |
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Institution: | (1) Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Institute of Advanced Studies, Australian National University, Canberra, Australia 0200, AU |
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Abstract: | The nature of the resonance interaction between two isotropic atoms in an excited configuration is reinvestigated. The currently
accepted oscillatory form for the long-range retarded resonance interaction is shown to be a subtle artefact that arises due
to too drastic approximations. Formulation of the resonance interaction energy problem in terms of the interacting system leads to a form that it is ∝ r
-4 in the retarded limit. We also demonstrate that the resonance interaction energy at any finite temperature goes over to purely
classical long-range asymptote. This manifestation of the correspondence principle is due to thermal excitation of the electromagnetic
field. We finally discuss why the textbook result for the F?rster energy transfer between two atoms is incorrect for the same
reasons.
Received 31 January 2002 / Received in final form 25 July 2002 Published online 29 October 2002
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ID="a"e-mail: mtb110@rsphysse.anu.edu.au |
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Keywords: | PACS 34 20 Cf Interatomic potentials and forces – 34 30 +h Intramolecular energy transfer intramolecular dynamics dynamics of van der Waals molecules |
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