Quick Start

Licensing

The full software license for DMRG++ version 3 can be found in file LICENSE in the root directory of the code. DMRG++ is a free and open source implementation of the DMRG algorithm. You are welcomed to use it and publish data obtained with DMRG++. If you do, please cite this work (see next subsection).

DISCLAIMER

 THE SOFTWARE IS SUPPLIED BY THE COPYRIGHT HOLDERS AND
 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 COPYRIGHT OWNER, CONTRIBUTORS, UNITED STATES GOVERNMENT,
 OR THE UNITED STATES DEPARTMENT OF ENERGY BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGE.

 NEITHER THE UNITED STATES GOVERNMENT, NOR THE UNITED
 STATES DEPARTMENT OF ENERGY, NOR THE COPYRIGHT OWNER, NOR
 ANY OF THEIR EMPLOYEES, REPRESENTS THAT THE USE OF ANY
 INFORMATION, DATA, APPARATUS, PRODUCT, OR PROCESS
 DISCLOSED WOULD NOT INFRINGE PRIVATELY OWNED RIGHTS.

How To Cite This Work

\@article{re:alvarez0209,
author="G. Alvarez",
title="The Density Matrix Renormalization Group for
Strongly Correlated Electron Systems: A Generic Implementation",
journal="Computer Physics Communications",
volume="180",
pages="1572-1578",
year="2009"}

\@article{re:alvarez0310,
author="G. Alvarez",
title="Implementation of the SU(2) Hamiltonian
Symmetry for the DMRG Algorithm",
journal="Computer Physics Communications",
volume="183",
pages="2226-2232",
year="2012"}


\@article{re:alvarez0311,
author="G. Alvarez and  L. G. G. V. Dias da Silva and
E. Ponce and  E. Dagotto",
title="Time Evolution with the DMRG Algorithm:
A Generic Implementation
for Strongly Correlated Electronic Systems",
journal="Phys. Rev. E",
volume="84",
pages="056706",
year="2011"}

\@article{re:alvarez0713,
author="G. Alvarez",
title="Production of minimally entangled typical thermal states
with the Krylov-space approach",
journal="Phys. Rev. B",
volume="87",
pages="245130",
year="2013"}

And also:
\@article{re:alvarez08,
 re:webDmrgPlusPlus,
 Author = {G. Alvarez},
 Title = {DMRG++ Website},
 Publisher = {\\url{https://g1257.github.com/dmrgPlusPlus}} }

Code Integrity

Hash of the latest commit is also posted at

https://g1257.github.com/hashes.html

Latest commit should always be signed. Keys at https://g1257.github.com/keys.html

Building and Running DMRG++

Required Software

Item GNU C++
Item (required) The LAPACK library.

The configure.pl script will ask for the LDFLAGS variable to pass to the compiler/linker. If the linux platform was chosen the default/suggested LDFLAGS will include -llapack. If the osx platform was chosen the default/suggested LDFLAGS will include -framework Accelerate. For other platforms the appropriate linker flags must be given. More information on LAPACK is at http://netlib.org/lapack/

Item (required) PsimagLite.

This is here https://github.com/g1257/PsimagLite/. You can do git clone https://github.com/g1257/PsimagLite.git in a separate directory outside of the DMRG++ distribution. configure.pl will ask you where you put it.

Item (optional) make or gmake (only needed to use the Makefile)
Item (optional) perl (only needed to run the configure.pl script)

Building DMRG++

 cd PsimagLite/lib
 perl configure.pl
 (you may now edit Config.make)
 make
 cd ../../
 cd dmrgpp/src
 perl configure.pl
 (you may now edit Config.make)
 make

Running DMRG++

./dmrg -f input.inp

Sample input files can be found under TestSuite/inputs/.

configure.pl creates the Makefile according to preferences in the file Config.make. If Config.make does not exist, configure.pl copies Config.make.sample into Config.make, but if Config.make exists, configure.pl will not overwrite it.

npatel37/dmrgornl