Robust and optimal laser cooling of trapped ions

TL;DR

This paper introduces a robust, fast laser cooling method for trapped ions that leverages quantum interference to achieve near-zero phonon occupation, outperforming existing schemes in speed and stability.

Contribution

The proposed cooling scheme is novel in using quantum interference for rapid, robust cooling with minimal phonon occupation, resilient to laser fluctuations.

Findings

Achieves near-zero phonon occupation rapidly

Robust against laser intensity and frequency fluctuations

Outperforms existing cooling methods in speed and stability

Abstract

We present a robust and fast laser cooling scheme suitable for trapped atoms and ions. Based on quantum interference, generated by a special laser configuration, it is able to rapidly cool the system such that the final phonon occupation vanishes to zeroth order in the Lamb-Dicke parameter in contrast to existing cooling schemes. Furthermore, it is robust under conditions of fluctuating laser intensity and frequency, thus making it a viable candidate for experimental applications.