# Radio Frequency Magneto-Optical Trapping of CaF with High Density

## TL;DR

This paper reports a significant advancement in molecular magneto-optical trapping, achieving higher densities and larger numbers of CaF molecules using RF modulation and cryogenic sources, paving the way for quantum simulation applications.

## Contribution

The study introduces a novel RF magneto-optical trap for CaF molecules with substantially increased density and molecule number compared to prior methods.

## Key findings

- Trap contains 1.1(3) x 10^5 CaF molecules
- Achieved density of 4(1) x 10^6 cm^-3
- Temperature near Doppler limit at 340(20) μK

## Abstract

We demonstrate significantly improved magneto-optical trapping of molecules using a very slow cryogenic beam source and RF modulated and DC magnetic fields. The RF MOT confines $1.1(3) \times 10^5$ CaF molecules at a density of $4(1) \times 10^6$ cm$^{-3}$, which is an order of magnitude greater than previous molecular MOTs. Near Doppler-limited temperatures of $340(20)$ $\mu$K are attained. The achieved density enables future work to directly load optical tweezers and create optical arrays for quantum simulation.