Piecewise adiabatic population transfer in a molecule via a wave packet

TL;DR

This paper introduces a robust method for quantum state population transfer in molecules using pulse trains and wave packets, enabling efficient ultracold molecule production with minimal prior knowledge.

Contribution

It develops a generalized adiabatic passage technique via wave packets, including piecewise STIRAP and chirped Raman passage with optical frequency combs, enhancing robustness and efficiency.

Findings

High-efficiency population transfer achieved

Robustness with minimal knowledge of excited states

Applicable to ultracold molecule production

Abstract

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