Fermi-edge singularities in the mesoscopic x-ray edge problem.


Journal Article

We study the x-ray edge problem for a chaotic quantum dot or nanoparticle displaying mesoscopic fluctuations. In the bulk, x-ray physics is known to produce Fermi-edge singularities-deviations from the naively expected photoabsorption cross section in the form of a peaked or rounded edge. For a coherent system with chaotic dynamics, we find substantial changes; in particular, a photoabsorption cross section showing a rounded edge in the bulk will change to a slightly peaked edge on average as the system size is reduced to a mesoscopic (coherent) scale.

Full Text

Duke Authors

Cited Authors

  • Hentschel, M; Ullmo, D; Baranger, HU

Published Date

  • October 22, 2004

Published In

Volume / Issue

  • 93 / 17

Start / End Page

  • 176807 -

PubMed ID

  • 15525108

Pubmed Central ID

  • 15525108

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.93.176807


  • eng