Active Stabilization of Ion Trap Radiofrequency Potentials

TL;DR

This paper presents a method to actively stabilize the oscillation frequency of a laser-cooled ion in an rf trap, significantly reducing noise and improving precision for quantum and mass spectrometry applications.

Contribution

The authors introduce a real-time stabilization technique for ion trap rf potentials, achieving high precision frequency control and noise suppression.

Findings

Achieved stabilization of 1 MHz ion oscillation frequency to better than 10 Hz.

Suppressed ambient noise on the rf circuit by 34 dB.

Potential to enhance ion trap quantum computing and mass spectrometry sensitivity.

Abstract

We actively stabilize the harmonic oscillation frequency of a laser-cooled atomic ion confined in a rf Paul trap by sampling and rectifying the high voltage rf applied to the trap electrodes. We are able to stabilize the 1 MHz atomic oscillation frequency to better than 10 Hz, or 10 ppm. This represents a suppression of ambient noise on the rf circuit by 34 dB. This technique could impact the sensitivity of ion trap mass spectrometry and the fidelity of quantum operations in ion trap quantum information applications.