Document Type
Article
Department/Program
Physics
Journal Title
Physical Review Letters
Pub Date
11-1998
Publisher
American Physical Society
Volume
81
Issue
21
First Page
4537
Abstract
We consider a system having decaying states with complex energies Ej−iΓj/2, and we define the “width-weighted spectrum” as DΓ(E)=ΣjΓjδ(E−Ej). We derive a semiclassical formula for this width-weighted spectrum, a formula which is analogous to the periodic-orbit representation of the density of states. The formula applies if classical motion is regular and if decay occurs by tunneling through a barrier. The semiclassical formula involves not periodic orbits or closed orbits, but action integrals associated with irreducible loops on the “extremal torus,” on which the particle climbs up the barrier and hangs at the top. Calculations confirm the validity of the formula.
Recommended Citation
Beims, M. W.; Kondratovich, V.; and Delos, John B., Semiclassical Representation of Width-Weighted Spectra (1998). Physical Review Letters, 81(21), 4537-4540.
https://doi.org/10.1103/PhysRevLett.81.4537
DOI
https://doi.org/10.1103/PhysRevLett.81.4537
