Lanczos algorithm for models of strongly correlated electrons
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README.md

Quick Start

Licensing

The full software license for LanczosPlusPlus++ version 1.0.0 can be found in file LICENSE. LanczosPlusPlus is a free and open source implementation of the Lanczos algorithm for models of strongly correlated electrons. You are welcomed to use it and publish data obtained with Lanczos++. If you do, please cite this work .

Code Integrity

Hash of the latest commit is also posted at https://g1257.github.com/hashes.html

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

How To Cite This Work

@article{re:alvarez09, 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", year="2009"}

And also:

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

Building and Running Lanczos++ TBW.

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.

Required Software

  • (required) GNU C++
  • (required) The LAPACK and BLAS libraries This library is available for most platforms. 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 here: http://netlib.org/lapack/
  • (required) PsimagLite. This is here \url{https://github.com/g1257/PsimagLite/}. You can do \verb=git clone https://github.com/g1257/PsimagLite.git= in a separate directory outside of the DMRG++ distribution. \verb=configure.pl= will ask you where you put it.
  • (optional) make or gmake (only needed to use the Makefile)
  • (optional) perl (only needed to run the configure.pl script)

Website

See https://g1257.github.com/LanczosPlusPlus/