Pulse-driven quantum dynamics beyond the impulsive regime

Details Pulse-driven quantum dynamics beyond the impulsive regime Pulse-driven quantum dynamics beyond the impulsive regime

2004-01-15

arxiv.org/abs/quant-ph/0401084v1

Phys. Rev. A 69, 033411 (2004)

Physics

Quantum Physics

15 pages, 5 color figures

Scientific paper

10.1103/PhysRevA.69.033411

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.

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