Scalable Control of Spin Quantum Memories in a Photonic Integrated Circuit

Golter, D. Andrew; Clark, Genevieve; Dandachi, Tareq El; Krastanov, Stefan; Zimmermann, Matthew; Greenspon, Andrew; Wan, Noel; Raniwala, Hamza; Chen, Kevin; Li, Linsen; Leenheer, Andrew Jay; Dong, Mark; Gilbert, Gerald; Eichenfield, Matt; Englund, Dirk

doi:10.1364/cleo_qels.2022.fth5l.3

Cited by 2 publications

(3 citation statements)

References 37 publications

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“…In our approach, piezoelectric cantilevers utilizing the aluminum nitride active layer in our photonics platform mechanically couple to a heterogeneously integrated QMC hosting implanted Sn vacancy defects (SnVs, Figure 1b). Onchip silicon nitride (SiN) waveguides optically couple to the QMC via inverse tapering, 20,27 providing a scalable interface between SnV fluorescence and an active PIC. We excite the SnVs through free space, perpendicular to the QMC, where a spatial light modulator enables simultaneous excitation of multiple color centers.…”

mentioning

confidence: 99%

“…Conventional spin control methods using electromagnetic fields and microwave striplines suffer from high energy consumption and crosstalk. 26,27 Researchers recently showed promising alternatives that rely on the coupling of CC ground state levels to driven acoustic phonons in the host crystal. 28−31 However, methods reported to date rely on propagating acoustic modes excited in bulk samples via piezoelectric transducers, 28 which present bottlenecks in component density and power dissipation under cryogenic conditions.…”

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confidence: 99%

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Nanoelectromechanical Control of Spin–Photon Interfaces in a Hybrid Quantum System on Chip

Clark,

Raniwala,

Koppa

et al. 2024

Nano Lett.

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Color centers (CCs) in nanostructured diamond are promising for optically linked quantum technologies. Scaling to useful applications motivates architectures meeting the following criteria: C1 individual optical addressing of spin qubits; C2 frequency tuning of spin-dependent optical transitions; C3 coherent spin control; C4 active photon routing; C5 scalable manufacturability; and C6 low on-chip power dissipation for cryogenic operations.Here, we introduce an architecture that simultaneously achieves C1− C6. We realize piezoelectric strain control of diamond waveguidecoupled tin vacancy centers with ultralow power dissipation necessary. The DC response of our device allows emitter transition tuning by over 20 GHz, combined with low-power AC control. We show acoustic spin resonance of integrated tin vacancy spins and estimate single-phonon coupling rates over 1 kHz in the resolved sideband regime. Combined with high-speed optical routing, our work opens a path to scalable single-qubit control with optically mediated entangling gates.

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confidence: 99%

mentioning

confidence: 99%

Nanoelectromechanical Control of Spin–Photon Interfaces in a Hybrid Quantum System on Chip

Clark,

Raniwala,

Koppa

et al. 2024

Nano Lett.

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“…Figure 3d shows an example PLE of an SnV − with an external magnetic field B = 0.13 T along the diamond axis [001], revealing the two spin-conserving transitions utilized for spin initialization and readout. The spin state can be controlled by an external microwave signal [17,20] or a modulated laser [21]. The ZPL frequency of SnV − can be tuned to overcome the inhomogeneous distribution via strain [10,22].…”

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confidence: 99%

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

Englund,

Li,

De Santis

et al. 2023

Preprint

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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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Scalable Control of Spin Quantum Memories in a Photonic Integrated Circuit

Abstract: Using magnetic field gradients and optimally shaped microwave pulses, we demonstrate selective control of color center spin qubits in a diamond micro-chiplet coupled to a photonic integrated circuit, yielding a platform for scalable qubit control.

Cited by 2 publications

References 37 publications

Nanoelectromechanical Control of Spin–Photon Interfaces in a Hybrid Quantum System on Chip

Nanoelectromechanical Control of Spin–Photon Interfaces in a Hybrid Quantum System on Chip

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

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