title: Classical invariants and the quantum-classical link
abstract: The classical invariants of a Hamiltonian system are expected to be derivable from the respective quantum spectrum. In fact, semiclassical expressions relate periodic orbits with eigenfunctions and eigenenergies of classical chaotic systems. Based on trace formulas, we construct smooth functions highly localized in the neighborhood of periodic orbits using only quantum information. Those functions show how classical hyperbolic structures emerge from quantum mechanics in chaotic systems. Finally, we discuss the proper quantum-classical link.
authors.affiliation: Departamento de Fisica, Comision Nacional de Energia Atomica, Avenida del Libertador 8250, 1429 Buenos Aires, Argentina and Departamento de Fisica "J.J. Giambiagi," FCEN, UBA, Pabellon 1, Ciudad Universitaria, 1428 Buenos Aires, Argen.
authors.initials: DA
authors.lastname: Wisniacki
authors.initials: E
authors.lastname: Vergini