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Manuscript Title: tmLQCD: a program suite to simulate Wilson Twisted mass Lattice QCD
Authors: Karl Jansen, Carsten Urbach
Program title: tmLQCD
Catalogue identifier: AEEH_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 180(2009)2717
Programming language: C and MPI.
Computer: any.
Operating system: any with a standard C compiler.
Has the code been vectorised or parallelized?: Yes. One or optionally any even number of processors may be used. Tested with up to 32768 processors.
RAM: no typical values available
Keywords: Hybrid Monte Carlo algorithm, Lattice QCD.
PACS: 11.15.-q, 11.15.Ha, 11.38.-t, 11.38.Gc.
Classification: 11.5.

External routines: LAPACK [1] and LIME [2] library.

Nature of problem:
Quantum Chromodynamics.

Solution method:
Markov Chain Monte Carlo using the Hybrid Monte Carlo algorithm with mass preconditioning and multiple time scales [3]. Iterative solver for large systems of linear equations.

Restrictions:
Restricted to an even number of (not necessarily mass degenerate) quark flavours in the Wilson or Wilson twisted mass formulation of lattice QCD.

Running time:
Depending on the problem size, the architecture and the input parameters from a few minutes to weeks.

References:
[1] http://www.netlib.org/lapack/.
[2] USQCD, http://usqcd.jlab.org/usqcd-docs/c-lime/.
[3] C. Urbach, K. Jansen, A. Shindler and U. Wenger, Comput. Phys. Commun. 174, 87 (2006), hep-lat/0506011.