Chaos theory Quantum theory Eigenvalues and eigenfunctions Hamiltonians Fourier transforms Functions Chaotic systems Floppy systems Hamiltonian systems Homoclinic motions Hyperbolic systems Lithium compounds Molecular systems Molecular vibrations Molecules Periodic orbits Spectrum analysis article Quantum chaos Atomic physics Bajos Submeridionales Central problems Chaotic dynamics Ciencias Naturales Closed systems Computational methods Correlation methods Dynamical analysis Eigen function External perturbations