We propose a class of schemes for robust population transfer between quantum states that utilize trains of coherent pulses and represent a generalized adiabatic passage via a wave packet. We study piecewise Stimulated Raman Adiabatic Passage with pulse-to-pulse amplitude variation, and piecewise chirped Raman passage with pulse-to-pulse phase variation, implemented with an optical frequency comb. In the context of production of ultracold ground-state molecules, we show that with almost no knowledge of the excited potential, robust high-efficiency transfer is possible
@article{arxiv.0710.5502,
title = {Piecewise adiabatic population transfer in a molecule via a wave packet},
author = {Evgeny A. Shapiro and Avi Pe'er and Jun Ye and Moshe Shapiro},
journal= {arXiv preprint arXiv:0710.5502},
year = {2009}
}