Statistical Mechanics of Canonical-Dissipative Systems and Applications to Swarm Dynamics

Details Statistical Mechanics of Canonical-Dissipative Systems and Applications to Swarm Dynamics Statistical Mechanics of Canonical-Dissipative Systems and Applications to Swarm Dynamics

2001-03-16

arxiv.org/abs/cond-mat/0103360v2

Physical Review E, vol 64, no. 2, pp. 021110 (12 pages)

Physics

Condensed Matter

Statistical Mechanics

14 pages incl. 13 figures. v2: misprints in Eq. (40) corrected, ref. updated. For related work see also: http://summa.physik

Scientific paper

10.1103/PhysRevE.64.021110

We develop the theory of canonical-dissipative systems, based on the assumption that both the conservative and the dissipative elements of the dynamics are determined by invariants of motion. In this case, known solutions for conservative systems can be used for an extension of the dynamics, which also includes elements such as the take-up/dissipation of energy. This way, a rather complex dynamics can be mapped to an analytically tractable model, while still covering important features of non-equilibrium systems. In our paper, this approach is used to derive a rather general swarm model that considers (a) the energetic conditions of swarming, i.e. for active motion, (b) interactions between the particles based on global couplings. We derive analytical expressions for the non-equilibrium velocity distribution and the mean squared displacement of the swarm. Further, we investigate the influence of different global couplings on the overall behavior of the swarm by means of particle-based computer simulations and compare them with the analytical estimations.

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