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Using defect centres in diamonds to build photonic and quantum optical devices

Andreas Wolfgang Schell, Janik Wolters, Tim Schröder +1 more

Elsevier eBooksJan 1, 20142 citations

Quantum Networks Using Color Defects in Diamond: Principles, Progress, and Perspectives

Ayan Majumder, Cem Güney Torun, Tim Schröder +3 more

Large-scale quantum networks will enable entirely new applications of quantum information science in fields such as quantum communication, distributed quantum computing, sensing, and metrology. To build nodes of such networks, diamond color defects are one of the promising candidates. Their excellent optical properties, fast spin-qubit control, and long spin coherence times make them well-suited for quantum information processing and quantum memory applications. Additionally, recent advances in the heterogeneous integration of diamond nanophotonic structures with photonic integrated circuits have made these systems more efficient and well-suited for scalable quantum processor architectures. In this comprehensive review, we discuss the optical and spin properties of these systems, recent progress in the building blocks of quantum networks, and demonstrations of metropolitan-scale quantum networks, as well as the challenges associated with these systems at both the fundamental and experimental levels, along with potential solutions.Large-scale quantum networks will enable entirely new applications of quantum information science in fields such as quantum communication, distributed quantum computing, sensing, and metrology. To build nodes of such networks, diamond color defects are one of the promising candidates. Their excellent optical properties, fast spin-qubit control, and long spin coherence times make them well-suited for quantum information processing and quantum memory applications. Additionally, recent advances in the heterogeneous integration of diamond nanophotonic structures with photonic integrated circuits have made these systems more efficient and well-suited for scalable quantum processor architectures. In this comprehensive review, we discuss the optical and spin properties of these systems, recent progress in the building blocks of quantum networks, and demonstrations of metropolitan-scale quantum networks, as well as the challenges associated with these systems at both the fundamental and experimental levels, along with potential solutions.

quant-pharXiv:2605.30005OpticaMay 29, 20260 citations

Observation of an environmentally insensitive solid-state spin defect in diamond

Brendon C. Rose, Ding Huang, Zi-Huai Zhang +10 more

In search of the right diamond defect Certain defects in diamond are among the most promising physical implementations of qubits, the building blocks of quantum computers. However, identifying a defect with balanced properties is tricky: Nitrogen vacancy centers have a long lifetime but comparatively poor optical properties, whereas negatively charged silicon vacancy centers have the opposite characteristics. Rose et al. used careful materials engineering to stabilize the neutral charge state of silicon vacancy centers and found that they combine long coherence times with excellent optical properties. Science , this issue p. 60In search of the right diamond defect Certain defects in diamond are among the most promising physical implementations of qubits, the building blocks of quantum computers. However, identifying a defect with balanced properties is tricky: Nitrogen vacancy centers have a long lifetime but comparatively poor optical properties, whereas negatively charged silicon vacancy centers have the opposite characteristics. Rose et al. used careful materials engineering to stabilize the neutral charge state of silicon vacancy centers and found that they combine long coherence times with excellent optical properties. Science , this issue p. 60

arXiv:1706.01555ScienceJul 5, 2018253 citations

Simulation Driven Search for Promising Quantum Defects in Diamond

Isaac Harris, Christopher J. Ciccarino, Blake Duschatko +2 more

Bulletin of the American Physical SocietyMar 5, 20190 citations

Nanophotonics with single defect centres in nanodiamonds for quantum technologies

Christophe Couteau

Jan 31, 20220 citations

Two-qubit quantum gates for defect qubits in diamond and similar systems

Dmitry Solenov, Sophia E. Economou, T. L. Reinecke

We propose a fast, scalable all-optical design for arbitrary two-qubit operations for defect qubits in diamond (nitrogen-vacancy centers) and in silicon carbide, which are promising candidates for room temperature quantum computing. The interaction between qubits is carried out by microcavity photons. The approach uses constructive interference from higher energy excited states activated by optical control. In this approach the cavity mode remains off-resonance with the directly accessible optical transitions used for initialization and readout. All quantum operations are controlled by near-resonant narrow-bandwidth optical pulses. We perform full quantum numerical modeling of the proposed gates and show that high-fidelity operations can be obtained with realistic parameters.We propose a fast, scalable all-optical design for arbitrary two-qubit operations for defect qubits in diamond (nitrogen-vacancy centers) and in silicon carbide, which are promising candidates for room temperature quantum computing. The interaction between qubits is carried out by microcavity photons. The approach uses constructive interference from higher energy excited states activated by optical control. In this approach the cavity mode remains off-resonance with the directly accessible optical transitions used for initialization and readout. All quantum operations are controlled by near-resonant narrow-bandwidth optical pulses. We perform full quantum numerical modeling of the proposed gates and show that high-fidelity operations can be obtained with realistic parameters.

arXiv:1303.0021Physical Review BOct 15, 20136 citations

Diamond for Quantum Computing

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Diamond for Quantum Computing

Abstract

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