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

pomerol2triqs release	Pomerol version	TRIQS version
v0.9	2.1	3.2.x, 3.3.x
v0.8	2.1	3.1.x
v0.7	2.0	3.1.x
v0.6	2.0	3.0.x
v0.5	1.3	3.0.x
v0.4	1.3	2.2.x
v0.3	1.3	2.1.x

License

Copyright (C) 2017-2024 Igor Krivenko <igor.s.krivenko @ gmail.com>

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/.