Atom-polyatomic collision rates are discussed, paying particular attention to the muItkenter nature of the intermolec-ula~ forces. A useful transition rate expression for energy loss shows the centra1 role pfayed by the space-time pair corretation functions of the target.
A renormalization approach to many-atom radiation processes
โ Scribed by M. Takatsuji
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 668 KB
- Volume
- 84
- Category
- Article
- ISSN
- 0378-4371
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โฆ Synopsis
We present a second-order many-body perturbation approach to coherent radiation processes. The theory gives a unified view of several many-atom effects as eigenmodes of the interacting atom-field system. Two renormalization procedures are essential to perform our program: (complex) energy renormalization using a noncanonical transformation and light-velocity renormalization using Bogoliubov transformation for field operators.
๐ SIMILAR VOLUMES
space scaling procedure is proposed for the treatment of diffusion problems in large lattices. In conjunction with a previously proposed time scaling procedure, space scaling yields a renormalization group technique, which can reduce by an almost arbitrarily large factor both the computer time and t