Towards a room-temperature spin quantum bus in diamond via optical spin injection, transport and detection

Abstract

Diamond is a proven solid-state platform for spin-based quantum technology. The nitrogen-vacancy (NV) center in diamond has been used to realize small-scale quantum information processing (QIP) and quantum sensing under ambient conditions. A major barrier in the development of large-scale QIP in diamond is the connection of NV spin registers by a quantum bus at room temperature. Given that diamond is expected to be an ideal spin transport material, the coherent transport of spin directly between the spin registers offers a potential solution. Yet, there has been no demonstration of spin transport in diamond due to difficulties in achieving spin injection and detection via conventional methods. Here, we exploit detailed knowledge of the paramagnetic defects in diamond to identify novel mechanisms to achieve spin injection, transport and detection in diamond at room temperature. Having identified these mechanisms, we explore how they may be combined to realise an on-chip spin quantum bus.

13 pages, 6 figures

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• Suppression of Spin Relaxation in Submicron InGaAs Wires
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Cited by in corpus (24)

• Sensitivity Optimization for NV-Diamond Magnetometry
• Electrical and optical control of single spins integrated in scalable semiconductor devices
• A Chirality-Based Quantum Leap
• Optical patterning of trapped charge in nitrogen-doped diamond
• Optical activation and detection of charge transport between individual color centers in room-temperature diamond
• On-Demand Generation of Neutral and Negatively-Charged Silicon-Vacancy Centers in Diamond
• Three-dimensional solid-state qubit arrays with long-lived spin coherence
• Spin decontamination for magnetic dipolar coupling calculations: Application to high-spin molecules and solid-state spin qubits
• Elliott-Yafet Spin-Phonon Relaxation Times from First Principles
• Probing metastable space-charge potentials in a wide bandgap semiconductor
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet
• Dark State Polarizing a Nuclear Spin in the Vicinity of a Nitrogen-Vacancy Center
• Detection and modeling of hole capture by single point defects under variable electric fields
• Long-term spin state storage using ancilla charge memories
• Dark defect charge dynamics in bulk chemical-vapor-deposition-grown diamonds probed via nitrogen vacancy centers
• All-optical hyperpolarization of electron and nuclear spins in diamond
• Electron-nuclear coherent spin oscillations probed by spin dependent recombination
• Wavelength dependence of nitrogen-vacancy center charge cycling
• Electrical readout microwave-free sensing with diamond
• Photoinduced charge injection from shallow point defects in diamond into water
• Direct Readout of Nitrogen-Vacancy Hybrid-Spin Quantum Register in Diamond by Photon Arrival Time Analysis
• Long-distance excitation of nitrogen-vacancy centers in diamond via surface spin waves
• Optically detected flip-flops between different spin ensembles in diamond
• Real-Time Charge Initialization of Diamond Nitrogen-Vacancy Centers for Enhanced Spin Readout