Continuum quantum systems as limits of discrete quantum systems, I: State vectors
Journal of Functional Analysis
153 - 166
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Dynamical systems on "continuum" Hilbert spaces may be realized as limits of dynamical systems on "discrete" (possibly finite-dimensional) Hilbert spaces. In this first of four papers on the topic, the "continuum" and "discrete" spaces are interfaced to one another algebraically, convergence of vectors is defined in such a way as to preserve inner products, and a necessary and sufficient coordinate-wise criterion for convergence is proved. © 2001 Academic Press.