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[Licence| Download | New Version Template] accp_v1_0.gz(8 Kbytes)
Manuscript Title: A fast algorithm for investigations on the three-dimensional Ising model. See erratum Comp. Phys. Commun. 55(1989)251.
Authors: M. Creutz, P. Mitra, K.J.M. Moriarty
Program title: ISING
Catalogue identifier: ACCP_v1_0
Distribution format: gz
Journal reference: Comput. Phys. Commun. 33(1984)361
Programming language: Fortran, Compass.
Computer: CDC CYBER 170-730.
Operating system: CDC NOS 2.1.
RAM: 25K words
Word size: 60
Keywords: Statistical physics, Thermodynamics, Ising model, Phase transitions, Critical exponents, Correlation functions, Magnetization, Microcanonical methods.
Classification: 23.

Nature of problem:
We wish to study the critical temperature and critical exponents of the three-dimensional Ising model.

Solution method:
A microcanonical method with demons is used for the simulation of the three-dimensional Ising model. The updating procedure is essentially deterministic and uses only integer arithmetic. Correlations can be measured.

Restrictions:
The only restriction on the use of the program is the time needed to acquire reasonable statistics.

Running time:
The execution time increases with the number of spin updates required. The program will carry out 860,000 spin updates per second on the CDC CYBER 170-730 or 24,000,000 spin updates per second, including measuring the demon energy and lattice magnetization, on the CDC 7600. The test run output with a reduced lattice size took 4.8 secs on the CDC CYBER 170-730.