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arXiv · 0705.3743

Extended Gibbs ensembles with flow

M. J. Ison·F. Gulminelli·C. Dorso
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Abstract

A statistical treatment of finite unbound systems in the presence of collective motions is presented and applied to a classical Lennard-Jones Hamiltonian, numerically simulated through molecular dynamics. In the ideal gas limit, the flow dynamics can be exactly re-casted into effective time-dependent Lagrange parameters acting on a standard Gibbs ensemble with an extra total energy conservation constraint. Using this same ansatz for the low density freeze-out configurations of an interacting expanding system, we show that the presence of flow can have a sizeable effect on the microstate distribution.

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M. J. Ison, F. Gulminelli, C. Dorso. 2007-05-25. Extended Gibbs ensembles with flow. https://doi.org/10.1103/physreve.76.051120

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