On the geometric potential derived from Hermitian momenta on a curved surface

Details On the geometric potential derived from Hermitian momenta on a curved surface On the geometric potential derived from Hermitian momenta on a curved surface

2005-08-14

arxiv.org/abs/quant-ph/0508104v1

Physics

Quantum Physics

6 pages, no figures

Scientific paper

A geometric potential $V_C$ depending on the mean and Gaussian curvatures of a surface $\Sigma$ arises when confining a particle initially in a three-dimensional space $\Omega$ onto $\Sigma$ when the particle Hamiltonian $H_\Omega$ is taken proportional to the Laplacian $L$ on $\Omega$. In this work rather than assume $H_\Omega \propto L$, momenta $P_\eta$ Hermitian over $\Omega$ are constructed and used to derive an alternate Hamiltonian $H_\eta$. The procedure leading to $V_C$, when performed with $H_\eta$, is shown to yield $V_C = 0$. To obtain a measure of the difference between the two approaches, numerical results are presented for a toroidal model.

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