Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2006-03-26
Nonlinear Sciences
Chaotic Dynamics
20 pages, no figures
Scientific paper
The Vlasov equation for the collisionless evolution of the single-particle probability distribution function (PDF) is a well-known example of coadjoint motion. Remarkably, the property of coadjoint motion survives the process of taking moments. That is, the evolution of the moments of the Vlasov PDF is also coadjoint motion. We find that {\it geodesic} coadjoint motion of the Vlasov moments with respect to powers of the single-particle momentum admits singular (weak) solutions concentrated on embedded subspaces of physical space. The motion and interactions of these embedded subspaces are governed by canonical Hamiltonian equations for their geodesic evolution.
Gibbons John
Holm Darryl D.
Tronci Cesare
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