Scalable quantum information processing architecture using a programmable array of spin-photon interfaces

Linsen Li | Lorenzo De Santis | Isaac Harris | Kevin Chen | Yixuan Song | Ian Christen | Matthew Trusheim | Carlos Errando-Herranz | Ruonan Han | Dirk Englund

A central challenge in quantum information processing is to generate a large-scale entanglement of quantum systems. A leading quantum information processing platform consists of qubits in the form of spin states of color centers in diamond, which has enabled essential demonstrations of quantum information processing. However, it is estimated that for general-purpose quantum information processors, millions to billions of qubits will be required, motivating the need for hardware architectures that are highly scalable by leveraging modern semiconductor integrated systems.

Here, we demonstrate a scalable quantum information processing hardware architecture in a proof of concept consisting of an array of tin-vacancy centers (SnV), addressable and tunable across a thousand diamond cavities integrated on a complementary metal-oxide-semiconductor (CMOS) control chip based on a foundry process. We demonstrate core capabilities including tuning of color center emission wavelength, spin initialization, single-shot spin readout, and coherent optical lines collection. With near coherent optical properties demonstrated across thousands of SnV centers in the system, this hardware architecture enables high-speed and high-fidelity entanglement distribution over millions of qubits.

Funding Sources: MITRE | NSF | QISE-NET Triplet award