Abstract
A combination of semiclassical arguments and random-matrix theory is used to analyze transition strengths in quantum systems whose associated classical systems are chaotic. The mean behavior is found semiclassically while the local fluctuations are characterized by a Porter-Thomas distribution. The methods are tested numerically for a system with two degrees of freedom, the coupled-rotators model. The deviations of the strength distribution from a Porter-Thomas one when the system is nonchaotic are also investigated. It is found that the distribution gets gradually wider as the classical system becomes more regular.
| Original language | English |
|---|---|
| Pages (from-to) | 374-377 |
| Number of pages | 4 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 39 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 1989 |
| Externally published | Yes |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
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