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Threshold Singularities in the 1D Hubbard Model
  KTH/Nordita/SU seminar in Theoretical Physics [before December 2013]

Wednesday 15 September 2010
from 11:00 to 12:00
at FA32 (OBS!)
Speaker : Fabian Essler (Oxford University)
Abstract : I consider the single-particle spectral function of the one dimensional Hubbard model below half-filling. For fixed momentum the spectral function exhibits kinematic thresholds as a function of energy. Above these thresholds the spectral function exhibits power-law singularities. I determine the threshold exponent, which is momentum dependent and differs from the Luttinger liquid prediction. The difference arises from irrelevant perturbations to the low-energy Luttinger liquid description.

Nordita  | Last modified 07 March 2015 09:18  |  HELP