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[Licence| Download | New Version Template] aegh_v3_0.tar.gz(9289 Kbytes)
Manuscript Title: Chaos Many-Body Engine v03: A new version of code C# for chaos analysis of relativistic many-body systems with reactions
Authors: I.V. Grossu, C. Besliu, Al. Jipa, D. Felea, T. Esanu, E. Stan, C.C. Bordeianu
Program title: Chaos Many-Body Engine v03
Catalogue identifier: AEGH_v3_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 184(2013)1346
Programming language: Visual C# .Net 2010.
Computer: PC.
Operating system: .Net Framework 4.0 running on MS Windows.
RAM: 128 Megabytes
Supplementary material: A pdf copy of the complete New Version Announcement can be downloaded here.
Keywords: 3d relativistic many-body simulation, Runge kutta algorithm, C#, .net, Lyapunov exponent, Reverse simulation precision test.
PACS: 24.60.Lz, 05.45.a.
Classification: 6.2, 6.5.

Does the new version supersede the previous version?: Yes

Nature of problem:
Chaos analysis of three-dimensional, relativistic many-body systems with reactions.

Solution method:
Second order Runge-Kutta algorithm. Implementation of temporal reversed simulation precision test, and "Structural Lyapunov" function.

Reasons for new version:
See Supplementary material.

Summary of revisions:
See Supplementary material.

The reverse simulation precision test does not apply for: systems with reactions, parallel simulations, and Monte Carlo simulations.

Additional comments:
In [1] we applied Chaos Many-Body Engine to some nuclear relativistic collisions at 4.5 A GeV/c (SKM 200 collaboration [5,6]). We considered also some first tests on He+He head-on collision at 1 A TeV/c (choose the Simulation\Collision menu, and set the appropriate parameters Fig.1). However, in this case, more complex reaction schemas should be considered. Further investigation on higher energies is currently in progress.

Running time:
Quadratic complexity

[1] I.V. Grossu, C. Besliu, Al. Jipa, E. Stan, T. Esanu, D. Felea, C.C. Bordeianu, Computer Physics Communications 183 (2012) 1055-1059
[2] Joseph Albahari, Ben Albahari, C# 4.0 in a Nutshell, O'Reilly, US, 2010, 311-434
[3] R.H. Landau, M.J. Paez, C.C. Bordeianu, Computational Physics: Problem Solving with Computers, Wiley-VCH-Verlag, Weinheim, 2007, 215-225
[4] M. Sandri, Numerical Calculation of Lyapunov Exponents, Mathematica J.6, 78-84, 1996.
[5] Al. Jipa, C. Besliu, Elemente de fizica nucleara relativista - Note de curs, Editura Universitatii din Bucuresti, Bucuresti, Romania, 2002
[6] C. Besliu, Al. Jipa, Rev.Roum.Phys.33 (1988) 409