OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 1 — Jan. 1, 1999
  • pp: 173–181

Semiclassical random electrodynamics: spontaneous emission and the Lamb shift

J. C. Camparo  »View Author Affiliations


JOSA B, Vol. 16, Issue 1, pp. 173-181 (1999)
http://dx.doi.org/10.1364/JOSAB.16.000173


View Full Text Article

Enhanced HTML    Acrobat PDF (318 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

It is often remarked that an explanation of spontaneous emission and the Lamb shift requires quantization of the electromagnetic field. Here these two quantities are derived in a semiclassical formalism by use of second-order perturbation theory. The purpose of the present paper is not to argue the validity of QED but rather to develop a semiclassical approximation to QED that may nonetheless have certain computational advantages over QED. To this end, the vacuum of QED is simulated with a classical zero-point field (ZPF), and as a consequence the resulting theory is entitled semiclassical random electrodynamics (SRED). In the theory, the atom is coupled to the ZPF and to its own radiation-reaction field through an electric dipole interaction. These two interactions add to produce exponential decay of excited states while they cancel each other to prevent spontaneous excitation of the ground state; the Lamb shift appears in the theory as an ac Stark shift induced by the ZPF. The spontaneous decay rate of an excited-state derived in SRED is equal to the Einstein A coefficient for that state, and the Lamb shift agrees with that of nonrelativistic QED. Moreover, SRED is shown to be useful for the numerical simulation of spontaneous decay.

© 1999 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(020.5580) Atomic and molecular physics : Quantum electrodynamics
(300.6210) Spectroscopy : Spectroscopy, atomic

Citation
J. C. Camparo, "Semiclassical random electrodynamics: spontaneous emission and the Lamb shift," J. Opt. Soc. Am. B 16, 173-181 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-1-173

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited