Canonical Quantization and Impenetrable Barriers

Details Canonical Quantization and Impenetrable Barriers Canonical Quantization and Impenetrable Barriers

2003-10-14

arxiv.org/abs/math-ph/0310023v2

Am. J. Phys. 72, (2004), 924-933

Physics

Mathematical Physics

to appear in Am.J.Phys (2004)

Scientific paper

We address an apparent conflict between the traditional canonical quantization framework of quantum theory and the spatially restricted quantum dynamics, when the translation invariance of the otherwise free quantum system is broken by boundary conditions. By invoking an exemplary case of a particle in an infinite well, we analyze spectral problems for related, confined and global, observables. In particular, we show how one can make sense of various operators pertaining to trapped particles by not ignoring the rest of the real line (e.g., that space which is never occupied by the particle in question).

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