Artículos de revistas
Self-adjoint extensions and spectral analysis in the Calogero problem
Fecha
2010Registro en:
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, v.43, n.14, 2010
1751-8113
10.1088/1751-8113/43/14/145205
Autor
Guitman, Dmitri Maximovitch
TYUTIN, I. V.
VORONOV, B. L.
Institución
Resumen
In this paper, we present a mathematically rigorous quantum-mechanical treatment of a one-dimensional motion of a particle in the Calogero potential alpha x(-2). Although the problem is quite old and well studied, we believe that our consideration based on a uniform approach to constructing a correct quantum-mechanical description for systems with singular potentials and/or boundaries, proposed in our previous works, adds some new points to its solution. To demonstrate that a consideration of the Calogero problem requires mathematical accuracy, we discuss some `paradoxes` inherent in the `naive` quantum-mechanical treatment. Using a self-adjoint extension method, we construct and study all possible self-adjoint operators (self-adjoint Hamiltonians) associated with a formal differential expression for the Calogero Hamiltonian. In particular, we discuss a spontaneous scale-symmetry breaking associated with self-adjoint extensions. A complete spectral analysis of all self-adjoint Hamiltonians is presented.