Design of a Lambda configuration in artificial coherent nanostructures

TL;DR

This paper explores implementing a three-level Lambda system in artificial atoms for quantum control, addressing decoherence challenges with novel strategies like symmetry breaking and dynamical decoupling in superconducting systems.

Contribution

It introduces two innovative methods to perform STIRAP in noisy environments, emphasizing the importance of non-Markovian effects in superconducting artificial atoms.

Findings

Proposed strategies effectively mitigate decoherence in Lambda systems.

Demonstrated the importance of non-Markovianity in decoherence control.

Guidelines for applying these methods to various superconducting atom implementations.

Abstract

The implementation of a three-level Lambda System in artificial atoms would allow to perform advanced control tasks typical of quantum optics in the solid state realm, with photons in the $\mathrm{\mu m}$/mm range. However hardware constraints put an obstacle since protection from decoherence is often conflicting with efficient coupling to external fields. We address the problem of performing conventional STImulated Raman Adiabatic Passage (STIRAP) in the presence of low-frequency noise. We propose two strategies to defeat decoherence, based on "optimal symmetry breaking" and dynamical decoupling. We suggest how to apply to the different implementations of superconducting artificial atoms, stressing the key role of non-Markovianity.