Optimised control of Stark-shift-chirped rapid-adiabatic-passage in a lambda-type three-level system

TL;DR

This paper optimizes Stark-shift-chirped rapid-adiabatic-passage (SCRAP) pulses in a lambda-type three-level system to improve robustness against inhomogeneous broadening, achieving higher fidelity than standard Gaussian pulses across various detunings.

Contribution

The paper introduces optimized SCRAP pulses that are more resistant to inhomogeneous broadening in lambda-type systems, enhancing quantum control fidelity.

Findings

Optimized pulses outperform Gaussian pulses in fidelity.

Enhanced robustness against inhomogeneous broadening.

Effective over a wide range of detunings.

Abstract

Inhomogeneous broadening of energy levels is one of the principal limiting factors for achieving "slow" or "stationary" light in solid state media by means of electromagnetically induced transparency (EIT), a quantum version of stimulated Raman adiabatic passage (STIRAP). Stark-shift-chirped rapid-adiabatic-passage (SCRAP) has been shown to be far less sensitive to inhomogeneous broadening than STIRAP, a population transfer technique to which it is closely related. We further optimise the pulses used in SCRAP to be even less sensitive to inhomogeneous broadening in a lambda-type three-level system. The optimised pulses perform at a higher fidelity than the standard gaussian pulses for a wide range of detunings (i.e. large inhomogeneous broadening).