For the one-dimensional (1 D) Hubbard model, we extended the bosonization technique, away from half filling, in such a way that a general formula is obtained for the zero temperature equal-time single-particle Green function with validity over the whole doping range. With our method, we can calculat
Spectral functions for the 2D Hubbard model
β Scribed by M. U. Luchini; D. M. Edwards
- Book ID
- 104926772
- Publisher
- Springer US
- Year
- 1995
- Tongue
- English
- Weight
- 308 KB
- Volume
- 99
- Category
- Article
- ISSN
- 0022-2291
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We constructed the one-particle spectral functions (diagonal and off-diagonal) which reproduce BCS for weak coupling and which take into account the effect of correlations on superconductivity in the attractive Hubbard model. The diagonal spectral function is composed of three peaks and the off-diag
The two-dimensional Hubbard model has been studied within the Composite Operator Method (COM) [1] starting from a basis made of the two Hubbard composite fields in the Nambu representation and computing the residual self-energy in the non-crossing approximation (NCA) [2]. The charge-charge, spinspin