Noncanonical-transformation approach to the x-ray-edge problem

Academic Article


  • An exact approach to the problem of x-ray-edge singularities is presented. We devise a transformation that eliminates from the Hamiltonian the process of creation of virtual electron-hole pairs and makes it possible to apply a rigid Fermi-sea picture. The transformed Hamiltonian can be diagonalized exactly. We demonstrate the power of this approach by obtaining the exact analytic form for the emission spectrum in the infinite-hole-mass case. © 1991 The American Physical Society.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Perakis IE; Chang YC
  • Start Page

  • 5877
  • End Page

  • 5880
  • Volume

  • 44
  • Issue

  • 11