Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-07-27
J.Math.Phys. 46 (2005) 103520
Physics
High Energy Physics
High Energy Physics - Theory
Some corrections to quantum polar coordinates formulae in sec 6. 19 pages ams-latex and 2 .eps figures
Scientific paper
10.1063/1.2084748
We illustrate the thesis that if time did not exist, we would have to create it if space is noncommutative, and extend functions by something like Schroedinger's equation. We propose that the phenomenon is a somewhat general mechanism within noncommutative geometry for `spontaneous time generation'. We show in detail how this works for the $su_2$ algebra $[x_i,x_j]=2\imath\lambda \epsilon_{ij}{}^kx_k$ as noncommutative space, by explicitly adjoining the forced time variable. We find the natural induced noncommutative Schroedingers equation and show that it has the correct classical limit for a particle of some mass $m\ne 0$, which is generated as a second free parameter by the theory. We show that plane waves exist provided $|\vec p|< \pi/2\lambda$, i.e. we find a Planckian bound on spatial momentum. We also propose dispersion relations $|{\del p^0\over\del \vec p}|=|\tan({\lambda}|\vec p|)|/m\lambda$ for the model and explore some elements of the noncommutative geometry. The model is complementary to our previous bicrossproduct one.
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