A new perturbative expansion of the time evolution operator associated with a quantum system
Paolo Aniello · Journal of Optics B Quantum and Semiclassical Optics · 2005
A novel expansion of the evolution operator associated with an—in general, time-dependent—perturbed quantum Hamiltonian is presented. It is shown that it has a wide range of possible realizations that can be fitted according to computational convenience or to satisfy specific requirements. As a remarkable example, the quantum Hamiltonian describing a laser-driven trapped ion is studied in detail.