Parallelized telecom quantum networking with a ytterbium-171 atom array

Long-distance quantum networking brings us the infrastructure for secure communication, distributed quantum computing and an entangled quantum sensor network. The neutral Yb-171 atom is a great candidate for both quantum computing and quantum repeaters since its level structure provides high fidelity quantum memories, gate operations, measurements, and strong coupling to a telecom wavelength photon. In this talk I will introduce our recent work generating the atom-photon entanglement of the Yb-171 at 1389 nm (fibre loss coefficient < 0.3 dB/km). We demonstrate the high-fidelity (SPAM corrected ≥ 96.13(81)%) time-bin encoded spin photon entanglement and measurements using an unbalanced Mach-Zehnder interferometer. Additionally, by imaging our atom array onto an optical fiber array, we demonstrate a parallelized networking protocol that could provide an N × boost in the remote entanglement rate. Finally, we demonstrate the ability to preserve coherence on a memory qubit while performing networking operations on communications qubits. Our work is a major step towards the integration of atomic processors and optical clocks into a high-rate or long-distance quantum network. Currently we are working towards the two-qubit gate with Rydberg interaction, which would pave the way to the long-range quantum repeater and clock network.