Full Single-Quantum Control of Particles in Penning Traps for Symmetry Tests at the Quantum Limit

TL;DR

This paper discusses developing quantum logic techniques for antimatter particles in Penning traps to enhance precision in fundamental symmetry tests, aiming to reach the quantum measurement limit.

Contribution

It introduces a novel method for full quantum control of antimatter particles in Penning traps using Coulomb coupling with a logic ion, advancing precision measurement capabilities.

Findings

Design of a cryogenic multi-Penning-trap system

Implementation of Coulomb-mediated quantum state mapping

Progress towards quantum-limited g-factor measurements

Abstract

The BASE collaboration aims to measure antimatter systems with the highest precision in order to perform a rigorous test of CPT symmetry and search for physics beyond the Standard Model. As part of the BASE collaboration, we pursue the development of quantum logic inspired cooling and detection techniques for g-factor measurements of (anti-)protons. Implementing these methods requires full quantum-level control of individual antimatter particles confined in cryogenic Penning traps. By mapping the (anti-)proton's internal state onto a co-trapped 9Be+ "logic" ion via free Coulomb coupling in a double-well potential, we can accelerate measurement cycles and push g-factor precision measurements on (anti-)protons toward the quantum limit. Here, we present an overview of the proposed method and the current status of the project, with special emphasis on the new cryogenic multi-Penning-trap stack and the proton detection system.