Limitations of constraint dynamics

L. P. Horwitz, F. Rohrlich

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Relativistic Hamiltonian constraint dynamics based on first-class constraints (classically or quantum mechanically) suffers from severe limitations. We show this here for the case of the two-body problem in relativistic quantum mechanics by a comparison with the Nambu-Schwinger-Bethe- Salpeter equation. The corresponding equation in constraint dynamics has a kernel that restricts the interactions to the elastic case: the individual particle energies are conserved in the center-of-mass frame.

Original languageEnglish
Pages (from-to)932-933
Number of pages2
JournalPhysical Review D
Issue number4
StatePublished - 1985
Externally publishedYes


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