Fermi-Edge Singularities in the Mesoscopic X-Ray Edge Problem

DOI to cite this document:: 10.5283/epub.9463

Hentschel, Martina ; Ullmo, Denis ; Baranger, Harold U.

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Date of publication of this fulltext: 18 Sep 2009 09:01

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Abstract

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 ...