title: Using preconditioned adaptive step size Runge-Kutta methods for solving the time-dependent Schrödinger equation.
abstract: If the Hamiltonian is time dependent it is common to solve the time-dependent Schrödinger equation by dividing the propagation interval into slices and using an (e.g., split operator, Chebyshev, Lanczos) approximate matrix exponential within each slice. We show that a preconditioned adaptive step size Runge-Kutta method can be much more efficient. For a chirped laser pulse designed to favor the dissociation of HF the preconditioned adaptive step size Runge-Kutta method is about an order of magnitude more efficient than the time sliced method.
authors.affiliation: Département de chimie, Université de Montréal, Case postale 6128, succursale Centre-ville, Montréal (Québec) H3C 3J7, Canada. jc.tremblay@umontreal.ca
authors.forename: Jean Christophe
authors.initials: JC
authors.lastname: Tremblay
authors.forename: Tucker
authors.initials: T
authors.lastname: Carrington