Theory and Interpretation of Pressure-Induced Resonances
Abstract
Both a bare-atom and dressed-atom picture of atom-field interactions are used to present a theory of the pressure-induced resonances that can arise when four radiation fields interact with a three level quantum system. The four fields drive to coupled atomic transitions which share a common level, the levels being arranged in a ladder scheme. As the field frequencies are varied, certain resonant structures in the excitation spectrum of the upper state population appear only in the presence of collisions. The resonant structures result from processes that have been referred to in past as collisionally aided radiative excitation (CARE) and pressure-induced extra resonances in origin, which can be linked to conservation of energy. In contrast to conventional PIER4 signals, line shapes calculated in this work result from a single atom rather than a collective emission. Moreover, the signals vanish unless the applied fields are relatively coherent, again in contrast to conventional PIER4. Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 15, 1989
- Accession Number
- ADA213107
Entities
People
- G. Grynberg
- P. R. Berman
Organizations
- New York University