Home
For authors
Submission status

Archive
Archive (English)
Current
   Volumes 113-119
   Volumes 93-112
      Volume 112
      Volume 111
      Volume 110
      Volume 109
      Volume 108
      Volume 107
      Volume 106
      Volume 105
      Volume 104
      Volume 103
      Volume 102
      Volume 101
      Volume 100
      Volume 99
      Volume 98
      Volume 97
      Volume 96
      Volume 95
      Volume 94
      Volume 93
Search
VOLUME 100 (2014) | ISSUE 3 | PAGE 218
On the density of states for the Hubbard model: pseudo-particle Keldysh diagram method - an alternative to DMFT?
DOI: 10.7868/S0370274X14150119
Abstract
It is shown how to construct Keldysh diagram technique for pseudo-particle approach to the Hubbard model. We propose self consistent equations for pseudo particle and electron Green functions in Keldysh diagram technique. Nonlocal effects (spatial dispersion) are included in single impurity problem in this method. Thus we can get rid of the artificial central peak (of Kondo type) in the density of states which is inevitable in Dynamical Mean Field Theory (DMFT). The changes in the density of states for 2D Hubbard model due to variation of Coulomb repulsion U and electron concentration are analyzed.