Quantum Control in the Cs 6S_{1/2} Ground Manifold Using rf and {\mu}w Magnetic Fields

TL;DR

This paper demonstrates high-fidelity quantum control of cesium atom ground states using optimized rf and microwave magnetic fields, enabling arbitrary state mappings with over 99% fidelity, advancing quantum manipulation techniques.

Contribution

The authors develop a robust, numerically optimized protocol for arbitrary quantum state mapping in cesium ground states using rf and microwave fields, achieving over 99% fidelity.

Findings

Achieved >99% average fidelity in state mapping

Developed robust control waveforms via numerical optimization

Enabled arbitrary state transformations in a 16-dimensional Hilbert space

Abstract

We implement arbitrary maps between pure states in the 16-dimensional Hilbert space associated with the ground electronic manifold of Cs. This is accomplished by driving atoms with phase modulated rf and {\mu}w fields, using modulation waveforms found via numerical optimization and designed to work robustly in the presence of imperfections. We evaluate the performance of a sample of randomly chosen state maps by randomized benchmarking, obtaining an average fidelity >99%. Our protocol advances state-of-the-art quantum control and has immediate applications in quantum metrology and tomography.