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arXiv · 2308.14289

Heterogeneous integration of spin-photon interfaces with a scalable CMOS platform

Linsen Li·Lorenzo De Santis·Isaac Harris·Kevin C. Chen·Yihuai Gao·Ian Christen·Matthew Trusheim·Hyeongrak Choi·Yixuan Song·Carlos Errando-Herranz·Jiahui Du·Yong Hu·Genevieve Clark·Mohamed I. Ibrahim·Gerald Gilbert·Ruonan Han·Dirk Englund
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Abstract

Color centers in diamonds have emerged as a leading solid-state platform for advancing quantum technologies, satisfying the DiVincenzo criteria and recently achieving a quantum advantage in secret key distribution. Recent theoretical works estimate that general-purpose quantum computing using local quantum communication networks will require millions of physical qubits to encode thousands of logical qubits, which presents a substantial challenge to the hardware architecture at this scale. To address the unanswered scaling problem, in this work, we first introduce a scalable hardware modular architecture "Quantum System-on-Chip" (QSoC) that features compact two-dimensional arrays "quantum microchiplets" (QMCs) containing tin-vacancy (SnV-) spin qubits integrated on a cryogenic application-specific integrated circuit (ASIC). We demonstrate crucial architectural subcomponents, including (1) QSoC fabrication via a lock-and-release method for large-scale heterogeneous integration; (2) a high-throughput calibration of the QSoC for spin qubit spectral inhomogenous registration; (3) spin qubit spectral tuning functionality for inhomogenous compensation; (4) efficient spin-state preparation and measurement for improved spin and optical properties. QSoC architecture supports full connectivity for quantum memory arrays in a set of different resonant frequencies and offers the possibility for further scaling the number of solid-state physical qubits via larger and denser QMC arrays and optical frequency multiplexing networking.

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Linsen Li, Lorenzo De Santis, Isaac Harris, Kevin C. Chen, Yihuai Gao, Ian Christen, Matthew Trusheim, Hyeongrak Choi, Yixuan Song, Carlos Errando-Herranz, Jiahui Du, Yong Hu, Genevieve Clark, Mohamed I. Ibrahim, Gerald Gilbert, Ruonan Han, Dirk Englund. 2023-12-20. Heterogeneous integration of spin-photon interfaces with a scalable CMOS platform. https://arxiv.org/abs/2308.14289

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