Optimized time-dependent perturbation theory for pulse-driven quantum dynamics in atomic or molecular systems

Details Optimized time-dependent perturbation theory for pulse-driven quantum dynamics in atomic or molecular systems Optimized time-dependent perturbation theory for pulse-driven quantum dynamics in atomic or molecular systems

2003-11-25

arxiv.org/abs/quant-ph/0311173v1

Phys. Rev. A 68, 051402(R) (2003)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.68.051402

We present a time-dependent perturbative approach adapted to the treatment of
intense pulsed interactions. We show there is a freedom in choosing secular
terms and use it to optimize the accuracy of the approximation. We apply this
formulation to a unitary superconvergent technique and improve the accuracy by
several orders of magnitude with respect to the Magnus expansion.

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