Optimum pulse shapes for stimulated Raman adiabatic passage

TL;DR

This paper develops an optimized pulse shaping method for STIRAP using the DDP approach, enhancing fidelity and robustness for quantum information processing.

Contribution

It introduces a novel DDP-based optimization technique for pulse shaping in STIRAP, improving its efficiency and robustness.

Findings

Optimized pulse shapes significantly increase STIRAP fidelity.

The method maintains robustness against parameter variations.

Enhanced robustness against losses and detuning.

Abstract

Stimulated Raman adiabatic passage (STIRAP), driven with pulses of optimum shape and delay has the potential of reaching fidelities high enough to make it suitable for fault-tolerant quantum information processing. The optimum pulse shapes are obtained upon reduction of STIRAP to effective two-state systems. We use the Dykhne-Davis-Pechukas (DDP) method to minimize nonadiabatic transitions and to maximize the fidelity of STIRAP. This results in a particular relation between the pulse shapes of the two fields driving the Raman process. The DDP-optimized version of STIRAP maintains its robustness against variations in the pulse intensities and durations, the single-photon detuning and possible losses from the intermediate state.