Robust two-state swap by stimulated Raman adiabatic passage

TL;DR

This paper presents a modified STIRAP protocol with non-zero detuning that enables robust and efficient swapping of quantum state populations regardless of initial conditions, enhancing quantum control techniques.

Contribution

The authors introduce a non-zero detuning modification to STIRAP, improving its robustness for population swapping from any initial state in a three-level quantum system.

Findings

Achieves high-fidelity population swapping for any initial state

Demonstrates robustness against variations in initial conditions

Potential applications in quantum state preparation and quantum gate design

Abstract

Efficient initialization and manipulation of quantum states is important for numerous applications and it usually requires the ability to perform high fidelity and robust swapping of the populations of quantum states. Stimulated Raman adiabatic passage (STIRAP) has been known to perform efficient and robust inversion of the ground states populations of a three-level system. However, its performance is sensitive to the initial state of the system. In this contribution we demonstrate that a slight modification of STIRAP, where we introduce a non-zero single-photon detuning, allows for efficient and robust population swapping for any initial state. The results of our work could be useful for efficient and robust state preparation, dynamical decoupling and design of quantum gates in ground state qubits via two-photon interactions.