Coherent manipulation of noise-protected superconducting artificial atoms in the Lambda scheme

TL;DR

This paper introduces a robust protocol for manipulating three-level superconducting artificial atoms in the Lambda configuration, enabling precise quantum control without direct pump coupling, crucial for quantum computing and photonics.

Contribution

It presents a novel Lambda-STIRAP protocol that uses phase modulation and two-photon pulses for noise-protected quantum state manipulation in superconducting atoms.

Findings

Protocol achieves faithful population transfer

Leverages phase stability of microwave drives

Applicable to complex quantum architectures

Abstract

We propose a new protocol for thr manipulation of a three-level artificial atom in Lambda ($\Lambda$) configuration in the absence of a direct pump coupling. It allows faithful, selective and robust population transfer analogous to stimulated Raman adiabatic passage ($\Lambda$-STIRAP), in highly noise protected superconducting artificial atoms. It combines the use of a two-photon pump pulse with suitable advanced control, operated by a slow modulation of the phase of the external fields, leveraging on the stability of semiclassical microwave drives. This protocol is a building block for novel tasks in complex quantum architectures. Its demonstration would be a benchmark for the implementation of a class of multilevel advanced control procedures for quantum computation and microwave quantum photonics in systems based on artificial atoms.