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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.

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.

[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.