Zobrazeno 1 - 10
of 3 096
pro vyhledávání: '"Leblanc, J"'
By merging algorithmic Matsubara integration with discrete pole representations we present a procedure to generate fully analytic closed form results for impurity problems at fixed perturbation order. To demonstrate the utility of this approach we st
Externí odkaz:
http://arxiv.org/abs/2407.01389
Autor:
Farid, Rayan, LeBlanc, J. P. F.
Publikováno v:
Phys. Rev. B 110, 144511 (2024)
We present a systematic study of the interaction, doping, and layer dependence of the $d_{x^2-y^2}$-wave pairing susceptibility of the Hubbard model for a stacked 2D square lattice. We perform a multi-index perturbative expansion up to fourth-order t
Externí odkaz:
http://arxiv.org/abs/2406.02656
The Emery model, or three-band Hubbard model, is a Hamiltonian that is thought to contain much of the physics of cuprate superconductors. This model includes two noninteracting $p$ orbitals and one interacting $d$ orbital per unit cell. Few methods t
Externí odkaz:
http://arxiv.org/abs/2308.14091
Autor:
Gazizova, Daria, LeBlanc, J. P. F.
We compute the perturbative expansion for the effective interaction $W$ of the half-filled 2-dimensional Hubbard model. We derive extensions of standard RPA resummations that include arbitrarily high order contributions in the $W_{\uparrow\uparrow}$
Externí odkaz:
http://arxiv.org/abs/2307.02360
Autor:
Assi, Ibsal, LeBlanc, J. P. F.
We present a symbolic algorithm for treating perturbative expansions of Hamiltonians with general two-body interactions. The method, formally equivalent to determinant Monte Carlo methods, merges well-known analytics with the recently developed symbo
Externí odkaz:
http://arxiv.org/abs/2305.09103
Autor:
Grandadam, M., LeBlanc, J. P. F.
We study the frequency and temperature dependence of the optical conductivity in the weakly coupled two-dimensional Hubbard model using a renormalized perturbative expansion. The perturbative expansion is based on the skeleton series for the current-
Externí odkaz:
http://arxiv.org/abs/2303.04964
Publikováno v:
Phys. Rev. B 107, 195138 (2023)
We compute the diagrammatic expansion of the particle-particle susceptibility via algorithmic Matsubara integration and compute the correlated pairing susceptibility in the thermodynamic limit of the 2D Hubbard Model. We study the static susceptibili
Externí odkaz:
http://arxiv.org/abs/2301.08176
We present a method to accelerate the numerical evaluation of spatial integrals of Feynman diagrams when expressed on the real frequency axis. This can be realized through use of a renormalized perturbation expansion with a constant but complex renor
Externí odkaz:
http://arxiv.org/abs/2211.02453
Brillouin light scattering spectroscopy was used to probe the room-temperature elasticity of crystalline high-$T_c$ superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$. A complete set of best-estimate elastic constants was obtained using established re
Externí odkaz:
http://arxiv.org/abs/2209.11738
We study the weak-coupling limit of the $t-t^\prime-U$ Hubbard model on a two-dimensional square lattice using a direct perturbative approach. Aided by symbolic computational tools, we compute the longitudinal density-density correlation functions in
Externí odkaz:
http://arxiv.org/abs/2203.09657