High finesse bow-tie cavity for strong atom-photon coupling in Rydberg arrays

TL;DR

This paper presents a high-finesse bow-tie optical cavity designed for strong atom-photon interactions in Rydberg atom arrays, enabling advanced quantum simulation and computation with enhanced coupling efficiency.

Contribution

The authors introduce a high-finesse bow-tie cavity with optimized parameters for strong coupling in Rydberg atom experiments, integrating atom trapping and imaging capabilities.

Findings

Finesse of 51,000 achieved at 852 nm

Cavity induces strong atom-photon coupling with cooperativity of 35

Design allows integration with Rydberg arrays for quantum applications

Abstract

We report a high-finesse bow-tie cavity designed for atomic physics experiments with Rydberg atom arrays. The cavity has a finesse of $51,000$ and a waist of $7.1$ $\mu$m at the cesium D2 line ($852$ nm). With these parameters, the cavity is expected to induce strong coupling between a single atom and a single photon, corresponding to a cooperativity per traveling mode of $35$ at the cavity waist. To trap and image atoms, the cavity setup utilizes two in-vacuum aspheric lenses with numerical aperture ($NA$) of $0.35$ and is capable of housing $NA=0.5$ microscope objectives. In addition, the large atom-mirror distance ($\gtrsim1.5$ cm) provides good optical access and minimizes stray electric fields at the position of the atoms. This cavity setup can operate in tandem with the Rydberg array platform, creating a fully connected system for quantum simulation and computation.