Scaled photonic interfaces for quantum networking with tin-vacancy color centers

In the decade since the first entanglement experiments with qubits in diamond, challenges of qubit uniformity, scaled interface efficiency, and system cost have mitigated the implementation of large-scale diamond-based quantum networks. This work addresses these challenges in a threefold manner. (1) Automated and parallelized precharacterization facilitates the selection of ideal qubits for heterogenous integration into a larger system. (2) This system consists of scalable integrated photonic circuitry equipped with efficient interfaces for the microwave, optical, and strain degrees of freedom of each qubit. (3) The choice of tin-vacancy (SnV^-) as a qubit increases the likelihood of finding suitable qubits for integration in emission-based entanglement protocols, along with natively enabling operation in 2 kelvin systems which can provide sufficient cooling power to sustain many qubits. Together, these advances support the implementation of functional multi-qubit quantum networks.