Degenerate dynamical systems

Joel Saavedra, Ricardo Troncoso, Jorge Zanelli

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


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 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.

Original languageEnglish
Pages (from-to)4383-4390
Number of pages8
JournalJournal of Mathematical Physics
Issue number9
StatePublished - Sep 2001
Externally publishedYes


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