2004/01/15 by D. Daems, S. Guérin, H. R. Jauslin +2
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.69.033411
published as Phys. Rev. A 69, 033411 (2004) · 15 pages, 5 color figures
arxiv created 2004/01/15 · arxiv updated 2009/12/01
We review various unitary time-dependent perturbation theories and compare them formally and numerically. We show that the Kolmogorov-Arnold-Moser technique performs better owing to both the superexponential character of correction terms and the possibility to optimize the accuracy of a given level of approximation which is explored in details here. As an illustration, we consider a two-level system driven by short pulses beyond the sudden limit.