Ultrafast stimulated Raman parallel adiabatic passage by shaped pulses

TL;DR

This paper introduces a rapid and robust population transfer method using shaped femtosecond pulses for parallel adiabatic passage in Raman systems, enabling ultrafast quantum state manipulation with low pulse energy.

Contribution

The authors develop a versatile shaped pulse technique for parallel adiabatic passage that achieves efficient population transfer with significantly reduced pulse energy and duration.

Findings

Achieves population transfer with as low as 3π pulse area

Operates on pico- and subpicosecond timescales

Compatible with modern pulse shaping technology

Abstract

We present a general and versatile technique of population transfer based on {\it parallel adiabatic passage} by femtosecond shaped pulses. Their amplitude and phase are specifically designed to optimize the adiabatic passage corresponding to parallel eigenvalues at all times. We show that this technique allows the robust adiabatic population transfer in a Raman system with the total pulse area as low as 3 $\pi$, corresponding to a fluence of one order of magnitude below the conventional stimulated Raman adiabatic passage process. This process of short duration, typically pico- and subpicosecond, is easily implementable with the modern pulse shaper technology and opens the possibility of ultrafast robust population transfer with interesting applications in quantum information processing.