# Observation of Mollow quintuplet in F=3/2 hyperfine structure state of 3He atomic cell

## TL;DR

This paper reports the experimental observation of the Mollow quintuplet in the F=3/2 hyperfine state of helium-3 atoms, demonstrating a complex quantum optical phenomenon transfer via metastability-exchange collisions.

## Contribution

First experimental demonstration of the Mollow quintuplet in the hyperfine structure of helium-3, extending understanding of quantum optical effects in atomic systems.

## Key findings

- Observation of Mollow quintuplet in 3He hyperfine state
- Transfer of Mollow Triplet via metastability-exchange collisions
- Effect also observed in 3He-4He mixture cell

## Abstract

We experimentally observed the Mollow quintuplet (MQ) in F=3/2 hyperfine structure state of 3He atoms. The metastability-exchange collisions (MECs) transfer the Mollow Triplet (MT) from the ground states of 3He atoms to the metastable states, and the MQ is demonstrated by four Zeeman levels of F=3/2 hyperfine states with linearly polarized light. The similar effect also achieves in the mixture cell of 3He and 4He.