LORENTZ-LORENZ SHIFT IN A BOSE-EINSTEIN CONDENSATE

Authors
RUOSTEKOSKI J JAVANAINEN J
Citation
J. Ruostekoski et J. Javanainen, LORENTZ-LORENZ SHIFT IN A BOSE-EINSTEIN CONDENSATE, Physical review. A, 56(3), 1997, pp. 2056-2059
Citations number
27
Categorie Soggetti
Physics
Journal title
Physical review. A → ACNP
ISSN journal
10502947
Volume
56
Issue
3
Year of publication
1997
Pages
2056 - 2059
Database
ISI
SICI code
1050-2947(1997)56:3<2056:LSIABC>2.0.ZU;2-J
Abstract
We study the quantum field theory of light-matter interactions for qua ntum degenerate atomic gases at low light intensity. We argue that the contact interactions between atoms emerging in the dipole gauge may b e ignored. Specifically, they are canceled by concurrent infinite leve l shifts of the atoms. Our development yields the classic Lorentz-Lore nz local-field shift of the atomic resonance.