High-fidelity quantum control via Autler-Townes splitting

TL;DR

This paper develops high-fidelity quantum control protocols for systems with Autler-Townes splitting, introducing shortcut techniques to achieve near-perfect state preparation rapidly, overcoming experimental lifetime limitations.

Contribution

It introduces a novel approach combining adiabatic and shortcut-to-adiabaticity protocols for efficient quantum state control in Autler-Townes systems.

Findings

High-fidelity state transfer using linear, arctan, and Roland-Cerf functions.

Accelerated adiabatic evolution achieves near-perfect fidelities faster.

Protocols are effective within experimental lifetime constraints.

Abstract

We propose quantum control protocols for the high-fidelity preparation of target states in systems with Autler-Townes splitting. We investigate an approximated three-level system obtained from a four-level one by adiabatically eliminating a state that does not participate in the evolution. In our work we use linear, arctan, and Roland-Cerf functions for transferring population between two eigenstates of the system obtaining a high fidelity for long evolution times. Additionally, in order to overcome the restriction given by the lifetimes of the experimental setup, we propose an accelerated adiabatic evolution with a shortcut to adiabaticity protocol, which allows us to reach fidelities close to one but much faster.