Juan Antonio Aparicio Calzada

Classical superintegrable SO (p, q) Hamiltonian systems

Abstract A family of superintegrable real Hamiltonian systems exhibiting SO ( p , q ) symmetry is obtained by symmetry reduction from free SU ( p , q ) integrable Hamiltonian systems. Among them we find Poschl-Teller potentials. The Hamilton-Jacobi equation is solved in a separable coordinate system in a generic way for the whole family. We also study the projection of the geodesic flow from the complex to the real systems.

Superintegrable quantum u(3) systems and higher rank factorizations

A class of two-dimensional superintegrable systems on a constant curvature surface is considered as the natural generalization of some well known one-dimensional factorized systems. By using standard methods to find the shape-invariant intertwining operators we arrive at a so(6) dynamical algebra and its Hamiltonian hierarchies. We pay attention to those associated to certain unitary irreducible representations that can be displayed by means of three-dimensional polyhedral lattices. We also discuss the role of superpotentials in this new context.

Intertwining symmetry algebras of quantum superintegrable systems on the hyperboloid

A class of quantum superintegrable Hamiltonians defined on a two-dimensional hyperboloid is considered together with a set of intertwining operators connecting them. It is shown that such intertwining operators close a su(2, 1) Lie algebra and determine the Hamiltonians through the Casimir operators. By means of discrete symmetries a broader set of operators is obtained closing a so(4, 2) algebra. The physical states corresponding to the discrete spectrum of bound states as well as the degeneration are characterized in terms of unitary representations of su(2, 1) and so(4, 2).

Contraction of superintegrable Hamiltonian systems

We investigate the contraction of a class of superintegrable Hamiltonians by implementing the contraction of the underlying Lie groups. We also discuss the behavior of the coordinate systems that separate their equations of motion, the motion constants, as well as the corresponding solutions along such a process.

Pseudo-orthogonal groups and integrable dynamical systems in two dimensions

Integrable systems in low dimensions, constructed through the symmetry reduction method, are studied using phase portrait and variable separation techniques. In particular, invariant quantities and explicit periodic solutions are determined. Widely applied models in Physics are shown to appear as particular cases of the method.

Algebraic aspects of Tremblay-Turbiner-Winternitz Hamiltonian systems

Using the factorization method we find a hierarchy of Tremblay-Turbiner-Winternitz Hamiltonians labeled by discrete indices. The shift operators (those connecting eigenfunctions of different Hamiltonians of the hierarchy) as well the ladder operators (they connect eigenstates of a determined Hamiltonian) obtained in this way close different algebraic structures that are presented here.

Intertwining Symmetry Algebras of Quantum Superintegrable Systems

We present an algebraic study of a kind of quantum systems belonging to a family of superintegrable Hamiltonian systems in terms of shape-invariant intertwinig operators, that span pairs of Lie algebras like (su(n),so(2n)) or (su(p,q),so(2p,2q)). The eigenstates of the associated Hamiltonian hierarchies belong to unitary representations of these algebras. It is shown that these intertwining operators, related with separable coordinates for the system, are very useful to determine eigenvalues and eigenfunctions of the Hamiltonians in the hierarchy. An study of the corresponding superintegrable classical systems is also included for the sake of completness.

Dynamical symmetries for superintegrable quantum systems

We study the dynamical symmetries of a class of two-dimensional superintegrable systems on a 2-sphere, obtained by a procedure based on the Marsden-Weinstein reduction, by considering its shape-invariant intertwining operators. These are obtained by generalizing the techniques of factorization of one-dimensional systems. We firstly obtain a pair of noncommuting Lie algebras su(2) that originate the algebra so(4). By considering three spherical coordinate systems, we get the algebra u(3) that can be enlarged by “reflexions” to so(6). The bounded eigenstates of the Hamiltonian hierarchies are associated to the irreducible unitary representations of these dynamical algebras.

Dynamical algebras of general Pöschl-Teller hierarchies

We investigate a class of operators connecting general Hamiltonians of the Poschl-Teller type. The operators involved depend on three parameters and their explicit action on eigenfunctions is found. The whole set of intertwining operators close a su(2, 2) ≈ so(4, 2) Lie algebra. The space of eigenfunctions supports a differential-difference realization of an irreducible representation of the su(2, 2) algebra.

Superintegrable hamiltonian systems: An algebraic approach

Using an algebraic approach in terms of a complete set of shape-invariant intertwinig operators we study a family of quantum superintegrable hamiltonian systems. These intertwining operators close a certain Lie algebra in such a way that the eigenstates of these Hamiltonians belong to some of its unitary representations.