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Classical and quantum higher order superintegrable systems from coalgebra symmetry

The N-dimensional generalization of Bertrand spaces as families of Maximally superintegrable systems on spaces with nonconstant curvature is analyzed. Considering the classification of two dimensional radial systems admitting 3 constants of the motion at most quadratic in the momenta, we will be able to generate a new class of spherically symmetric M.S. systems by using a technique based on coalgebra. The 3-dimensional realization of these systems provides the entire classification of classical spherically symmetric M.S. systems admitting periodic trajectories. We show that in dimension N > 2 these systems (classical and quantum) admit, in general, higher order constants of motion and turn out to be exactly solvable. Furthermore it is possible to obtain non radial M.S. systems by introducing projection of the original radial system to a suitable lower dimensional space.