Resolving an Individual One-Proton Spin Flip to Determine a Proton Spin State

TL;DR

This paper demonstrates the detection of individual proton spin flips using quantum jump spectroscopy, enabling more precise measurements of proton and antiproton magnetic moments.

Contribution

It introduces a method to resolve single proton spin flips, improving the accuracy of magnetic moment measurements over previous techniques.

Findings

Confirmed detection of individual spin transitions

Achieved high-fidelity spin state detection

Potential for more precise magnetic moment measurements

Abstract

Previous measurements with a single trapped proton or antiproton detected spin resonance from the increased scatter of frequency measurements caused by many spin flips. Here a measured correlation confirms that individual spin transitions and states are detected instead. The high fidelity suggests that it may be possible to use quantum jump spectroscopy to measure the p and \pbar magnetic moments much more precisely.