Degenerate Dynamical Systems

Details Degenerate Dynamical Systems Degenerate Dynamical Systems

2000-11-26

arxiv.org/abs/hep-th/0011231v3

J.Math.Phys. 42 (2001) 4383-4390

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 1 figure, two columns, revtex. Minor changes. Final version for J. Math. Phys

Scientific paper

10.1063/1.1389088

Dynamical systems whose symplectic structure degenerates, becoming noninvertible at some points along the orbits are analyzed. It is shown that for systems with a finite number of degrees of freedom, like in classical mechanics, the degeneracy occurs on domain walls that divide phase space into nonoverlapping regions each one describing a nondegenerate system, causally disconnected from each other. These surfaces are characterized by the sign of the Liouville's flux density on them, behaving as sources or sinks of orbits. In this latter case, once the system reaches the domain wall, it acquires a new gauge invariance and one degree of freedom is dynamically frozen, while the remaining degrees of freedom evolve regularly thereafter.

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