Classical and quantum mechanics of the nonrelativistic Snyder model

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.