Efficient qubit detection using alkali earth metal ions and a double STIRAP process

TL;DR

This paper proposes a robust method for qubit measurement in alkali earth metal ions using a double STIRAP process, analyzing how various experimental parameters affect efficiency.

Contribution

It introduces a novel double STIRAP scheme for efficient qubit detection in alkali earth ions, with a detailed analysis of parameter dependencies.

Findings

Efficiency depends on Rabi frequencies and pulse widths

Laser linewidths and detunings significantly impact performance

Residual laser power and ion motion influence measurement accuracy

Abstract

We present a scheme for robust and efficient projection measurement of a qubit consisting of the two magnetic sublevels in the electronic ground state of alkali earth metal ions. The scheme is based on two stimulated Raman adiabatic passages (STIRAP) involving four partially coherent laser fields. We show how the efficiency depends on experimentally relevant parameters: Rabi frequencies, pulse widths, laser linewidths, one- and two-photon detunings, residual laser power, laser polarization and ion motion.