On Hamiltonian formulations of the Schrödinger system

Details On Hamiltonian formulations of the Schrödinger system On Hamiltonian formulations of the Schrödinger system

2003-01-09

arxiv.org/abs/hep-th/0301052v1

Annals Phys. 298 (2002) 394-402

Physics

High Energy Physics

High Energy Physics - Theory

Scientific paper

10.1006/aphy.2002.6262

We review and compare different variational formulations for the Schr\"{o}dinger field. Some of them rely on the addition of a conveniently chosen total time derivative to the hermitic Lagrangian. Alternatively, the Dirac-Bergmann algorithm yields the Schr\"{o}dinger equation first as a consistency condition in the full phase space, second as canonical equation in the reduced phase space. The two methods lead to the same (reduced) Hamiltonian. As a third possibility, the Faddeev-Jackiw method is shown to be a shortcut of the Dirac method. By implementing the quantization scheme for systems with second class constraints, inconsistencies of previous treatments are eliminated.

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