Improving the stimulated Raman adiabatic passage via dissipative quantum dynamics

TL;DR

This paper introduces a dissipative quantum dynamics approach to enhance stimulated Raman adiabatic passage (STIRAP), making it faster and more robust against dephasing, initial state imperfections, and dissipation effects.

Contribution

The authors develop a novel scheme that leverages dissipative effects to improve population transfer in STIRAP, turning dissipation from a hindrance into an advantage.

Findings

The scheme achieves fast, robust population transfer despite initial imperfections.

It is insensitive to moderate fluctuations and dissipation effects.

Dephasing and initial state imperfections become resources rather than obstacles.

Abstract

We propose a method to improve the stimulated Raman adiabatic passage (STIRAP) via dissipative quantum dynamics, taking into account the dephasing effects. Fast and robust population transfer can be obtained with the scheme by the designed pulses and detuning, even though the initial state of the system is imperfect. With a concrete three-level system as an example, the influences of the imperfect initial state, variations in the control parameters, and various dissipation effects are discussed in detail. The numerical simulation shows that the scheme is insensitive to moderate fluctuations of experimental parameters and the relatively large dissipation effects of the excited state. Furthermore, the dominant dissipative factors, namely, the dephasing effects of the ground states and the imperfect initial state are no longer undesirable, in fact, they are the important resources to the scheme. Therefore, the scheme could provide more choices for the realization of the complete population transfer in the strong dissipative fields