Phys. Rev. B 68, 153104 (2003) [4 pages]On Solutions of the nonequilibrium x-ray edge problemReceived 15 November 2002; published 22 October 2003 We rediscuss a nonequilibrium x-ray edge problem which in recent publications led to discrepancies between the results of the perturbative and of an extended Nozières-De Dominicis approach. We show that this problem results from an uncritical separation of momenta of the scattering potential, and we propose a corrected Nozières-De Dominicis solution. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.68.153104
DOI:
10.1103/PhysRevB.68.153104
PACS:
78.70.Dm, 72.20.Ht
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