Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2011-04-04
Phys.Rev.D84:025021,2011
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, 5 figures, plain TeX. Some points have been simplified. Version published on PRD
Scientific paper
10.1103/PhysRevD.84.025021
The Snyder model is an example of noncommutative spacetime admitting a fundamental length scale $\beta$ and invariant under Lorentz transformations, that can be interpreted as a realization of the doubly special relativity axioms. Here, we consider its nonrelativistic counterpart, i.e. the Snyder model restricted to three-dimensional Euclidean space. We discuss the classical and the quantum mechanics of a free particle in this framework, and show that they strongly depend on the sign of a coupling constant $\lambda$, appearing in the fundamental commutators and proportional to $\beta^2$. For example, if $\lambda$ is negative, momenta are bounded. On the contrary, for positive $\lambda$, positions and areas are quantized. We also give the exact solution of the harmonic oscillator equations both in the classical and the quantum case, and show that its frequency is energy dependent.
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