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Title: X-ray edge singularity in non-equilibrium systems
Authors: Ng, Tai-Kai
Keywords: X-ray edge singularity
Fermi seas
Equilibrium systems
Orthogonality catastrophe effect
Issue Date: Jan-1995
Citation: Physical review. B, v. 51, iss. 3, Jan 1995, p. 2009-2012
Abstract: We investigate the problem of how the phenomenon of x-ray edge singularity got modified in a class of non-equilibrium systems with more than one Fermi seas at different chemical potentials coupling to each other. The is solved by generalizing the solution of Noziéres and De Domincis problem for equilibrium systems to the present non-equilibrium situation. We find a much stronger orthogonality catastrophe effect associated with potential differences between different Fermi seas. Some consequences of the present result are pointed out.
Rights: Physical Review, B © copyright (1995) American Physical Society. The Journal's web site is located at
Appears in Collections:PHYS Journal/Magazine Articles

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