This is a beta version softwware.

A Lanczos based solver for interacting electrons on a lattice exploiting distributed memory MPI parallelisation. This software focuses on the normal case (as opposed to superconducting or spin non-conserving cases) including long range magnetic ordering and arbitrary lattices.

The code is written around the SciFortran library. Dependencies are:

• gfortran > 9.0.0 OR ifort > 13.0
• cmake > 3.0.0
• MPI
• SciFortran

Installation is available using CMake.

Clone the repo:

git clone https://github.com/QcmPlab/EDlattice EDlattice

and from the just created directory make a standard out-of-source CMake compilation:

mkdir build
cd build
cmake ..
make
make install

The CMake compilation can be controlled using the following additional variables, default values between < >:

• -DPREFIX=prefix directory <~/opt/>
• -DUSE_MPI=<yes>/no
• -DVERBOSE=yes/<no>
• -DBUILD_TYPE=<RELEASE>/TESTING/DEBUG

The library can be loaded into the operative system using one of the following, automatically generated, methods:

• environment module file ~/.modules.d/edlat/<PLAT>
• homebrew bash script <PREFIX>/etc/config_edlat.sh
• pkg-config file in ~/.pkg-config.d/edlattice.pc

Method 2. has the advantage of making uninstall operation feasible.

The library is removed with the command:

make uninstall

from the same building directory as for the installation part.

For any information contact the author as:
adriano DOT amaricci @ gmail DOT com

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COPYRIGHT & LICENSING
Copyright (c), Adriano Amaricci.
All rights reserved.

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.

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

The software is provided as it is and can be read and copied, in agreement with the Terms of Service of GITHUB.

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.

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