Waveguide-array-based multiplexed photonic interface for atom array

TL;DR

This paper demonstrates a multiplexed photonic interface that efficiently couples photons from a neutral atom array into a waveguide array, enabling scalable quantum networking with high fidelity.

Contribution

It introduces a novel integrated photonic interface that couples multiple atom-photon entangled channels into a waveguide array, advancing quantum communication technology.

Findings

10 out of 32 channels successfully coupled photons from 10 atom sites

Achieved polarization correlation visibility of 0.87

Demonstrated potential for large-scale quantum networking

Abstract

The growing demand for high-capacity quantum communication and large-scale quantum computing underscores the importance of networking quantum processing units via multiplexed photonic channels. A neutral atom array with multiplexed atom-photon entanglement is a promising platform for its realization. Here, we demonstrate a key multiplexed photonic interface guiding the photons from an atom array to a single-mode waveguide array fabricated on a glass-based photonic integrated circuit. Remarkable 10 channels out of the 32-channel waveguide array with 25 $\mu$m pitch couple to photons from 10 sites of the atom array with Rydberg gate-enabled separation. Based on the observed correlation between the atomic states and the polarization of the photon with a visibility of 0.87, we anticipate its applicability to a large-scale multiplexed atom-photon entanglement generation for networking quantum processing units.