76 citations · 233 across the 7 of their papers we have counts for
7 papers
Conserving approximations vs Two-Particle Self-Consistent Approach
S. Allen, A. -M. S. Tremblay, Y. M. Vilk
The conserving approximation scheme to many-body problems was developed by Kadanoff and Baym using the functional-derivative approach. Another approach for the Hubbard model also s…
Two-particle self-consistent approximation, pseudogap and superconductivity in the attractive Hubbard model
Steve Allen
In this thesis, I present a non-perturbative approach to the single-band attractive Hubard model which is an extension of previous work by Vilk and Tremblay on the repulsive model.…
Non-perturbative approach to the attractive Hubbard model
S. Allen, A. -M. S. Tremblay
A non-perturbative approach to the single-band attractive Hubbard model is presented in the general context of functional derivative approaches to many-body theories. As in previou…
Pairing fluctuations and pseudogaps in the attractive Hubbard model
B. Kyung, S. Allen, A. -M. S. Tremblay
The two-dimensional attractive Hubbard model is studied in the weak to intermediate coupling regime by employing a non-perturbative approach. It is first shown that this approach i…
Many-body Theory vs Simulations for the pseudogap in the Hubbard model
S. Moukouri, S. Allen, F. Lemay +4
The opening of a critical-fluctuation induced pseudogap (or precursor pseudogap) in the one-particle spectral weight of the half-filled two-dimensional Hubbard model is discussed.…
Role of symmetry and dimension on pseudogap phenomena
S. Allen, H. Touchette, S. Moukouri +2
The attractive Hubbard model in d=2 is studied through Monte Carlo simulations at intermediate coupling. There is a crossover temperature where a pseudogap appears with conco…