Observation of Mollow triplet with metastability exchange collisions in 3He atoms

TL;DR

This paper reports the experimental observation of the Mollow triplet in 3He atoms induced by ultra-low-frequency magnetic fields, demonstrating long coherence times and potential applications in magnetic sensing and optical modulation.

Contribution

It presents the first observation of the Mollow triplet in 3He atoms under ultra-low-frequency magnetic fields and shows transfer of signatures via metastability-exchange collisions.

Findings

Observed Mollow triplet at 4 Hz magnetic field

Achieved 2 seconds coherence time in dressed ground states

Demonstrated potential for ultra-low-frequency magnetic sensing

Abstract

We study the dressed states of 3He atoms and experimentally observe the Mollow triplet (MT) induced with an ultra-low-frequency (ULF) oscillating magnetic field as low as 4 Hz. The ULF MT signatures from the ground states of 3He atoms are transferred to the metastable states by metastability-exchange collisions (MECs) and measured optically, which demonstrates 2 s coherence time in the dressed ground states. The result shows the possibility of ULF magnetic field amplitude measurement and a new scheme for optical frequency modulation.