Quantum local-field corrections and spontaneous decay

Stefan Scheel, Ludwig Knöll, Dirk-Gunnar Welsch, Stephen M. Barnett

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Abstract

A recently developed scheme [S. Scheel, L. Knöll, and D.-G. Welsch, Phys. Rev. A 58, 700 (1998)] for quantizing the macroscopic electromagnetic field in linear dispersive and absorbing dielectrics satisfying the Kramers-Kronig relations is used to derive the quantum local-field correction for the standard virtual-sphere-cavity model. The electric and magnetic local-field operators are shown to become approximately consistent with QED only if the polarization noise is fully taken into account. It is shown that the polarization fluctuations in the local field can dramatically change the spontaneous decay rate, compared with the familiar result obtained from the classical local-field correction. In particular, the spontaneous emission rate strongly depends on the radius of the local-field virtual cavity.
Original languageEnglish
Pages (from-to)1590 -1597
Number of pages8
JournalPhysical Review A
Volume60
Issue number2
DOIs
Publication statusPublished - Aug 1999

Keywords

  • macroscopic electromagnetics
  • dielectrics
  • virtual-sphere-cavity model
  • polarization
  • spontaneous decay
  • quantum

Cite this

Scheel, S., Knöll, L., Welsch, D-G., & Barnett, S. M. (1999). Quantum local-field corrections and spontaneous decay. Physical Review A, 60(2), 1590 -1597. https://doi.org/10.1103/PhysRevA.60.1590