pomerol2triqs

Quick and dirty TRIQS wrapper around the Pomerol exact diagonalization library.

To learn how to use this wrapper, see example subdir in the source directory.

Features

• Diagonalization of finite fermionic models with Hamiltonians written in terms of second quantization operators.
• Calculation of single-particle Green's functions: $G(\tau)$, $G(i\omega_n)$, $G(\omega)$.
• Calculation of two-particle Green's functions: $G(\omega;\nu,\nu')$ and $G(\omega;\ell,\ell')$.
• Calculation of ensemble averages of quadratic operators, $\langle c^\dagger_i c_j \rangle$.
• Calculation of dynamic susceptibilities $\langle \mathbb{T} c^\dagger_i(\tau) c_j(0^+) c^\dagger_k(\tau) c_l(0) \rangle$, $\langle \mathbb{T} c^\dagger_i(\tau) c_j(\tau) c^\dagger_k(0^+) c_l(0) \rangle$, $\langle \mathbb{T} c^\dagger_i(\tau) c_j(0) c^\dagger_k(0^+) c_l(\tau) \rangle$ in the Matsubara frequency representation.
• Calculation of 3-point fermion-boson susceptibilities $\langle \mathbb{T} c^\dagger_i(\tau) c_j(0^+) c^\dagger_k(\tau') c_l(0) \rangle$, $\langle \mathbb{T} c^\dagger_i(\tau) c_j(\tau') c^\dagger_k(0^+) c_l(0) \rangle$, $\langle \mathbb{T} c^\dagger_i(\tau) c_j(0) c^\dagger_k(0^+) c_l(\tau') \rangle$ in the Matsubara frequency representation.

Notation for the two-particle Green's functions is adopted from the PhD thesis of Lewin Boehnke.

Installation

• Install the Pomerol exact diagonalization library.
• Install the TRIQS library.
• source <path_to_triqs_install_dir>/share/triqs/triqsvars.sh (skip this step if TRIQS has been installed in a system location, e.g. /usr or /usr/local on Linux).
• git clone https://github.com/pomerol-ed/pomerol2triqs.git pomerol2triqs.git
• mkdir pomerol2triqs.build && cd pomerol2triqs.build
• cmake ../pomerol2triqs.git -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=<path_to_install_dir> -DPOMEROL_PATH=<path_to_pomerol_install_dir>
• make
• make test
• make install

Pomerol and TRIQS version compatibility

License

Copyright (C) 2017-2024 Igor Krivenko <iskrivenko [at] proton [dot] me>

With contributions from

• Hugo U.R. Strand
• Nils Wentzell
• Dominik Kiese

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.