Quantifying NV-center Spectral Diffusion by Symmetry

McCullian, Brendan; Cheung, Hil Fung Harry; Chen, Huiyao; Fuchs, G. D.

doi:10.48550/arxiv.2206.11362

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…Here, we use the notation NV i (i = 1, 2, 3, 4) to respectively indicate the four possible spin axes in diamond [111], [111], [111], and [111] which can be determined by magnetometry and/or polarizationresolved measurements. [28,41,42] Due to trigonal symmetry, the normalized power of NVs in (100)-oriented diamond is the sum of the perpendicular and parallel components with respective weights 1 3 and 2 3 , regardless of the NV spin orientation. This result is consistent with calculations shown in refs.…”

Section: Resultsmentioning

confidence: 99%

Modeling of Radiative Emission from Shallow Color Centers in Single Crystalline Diamond

Zahedian

Liu

Vidrio

et al. 2023

Laser & Photonics Reviews

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Optically active defects in diamond are widely used as bright single‐photon sources for quantum sensing, computing, and communication. For many applications, it is useful to place the emitter close to the diamond surface, where the radiative properties of the emitter are strongly modified by its dielectric environment. It is well‐known that the radiative power from an electric dipole decreases as the emitter approaches an interface with a lower‐index dielectric, leading to an increase in the radiative lifetime. For emitters in crystalline solids, modeling of this effect needs to take into account the crystal orientation and direction of the surface cut, which can greatly impact the emission characteristics. In this paper, a framework for analyzing the emission rates of shallow (<100 nm) defects is provided, in which optical transitions are derived from electric dipoles in a plane perpendicular to their spin axis. The calculations for the depth‐dependent radiative lifetime for color centers in (100)‐, (110)‐, and (111)‐cut diamond are presented, which can be extended to other vacancy defects in diamond.

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Section: Resultsmentioning

confidence: 99%

Modeling of Radiative Emission from Shallow Color Centers in Single Crystalline Diamond

Zahedian

Liu

Vidrio

et al. 2023

Laser & Photonics Reviews

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“…The optical transition frequencies of the NV center are sensitive to (laser-induced) changes in the charge-environment [33][34][35][36]. To mitigate this effect we perform a Charge-Resonance (CR) check prior to every experimental run [28].…”

Section: Experimental Setup: Nv Centersmentioning

confidence: 99%

Entangling remote qubits using the single-photon protocol: an in-depth theoretical and experimental study

et al. 2023

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The generation of entanglement between remote matter qubits has developed into a key capability for fundamental investigations as well as for emerging quantum technologies. In the single-photon, protocol entanglement is heralded by generation of qubit-photon entangled states and subsequent detection of a single photon behind a beam splitter. In this work we perform a detailed theoretical and experimental investigation of this protocol and its various sources of infidelity. We develop an extensive theoretical model and subsequently tailor it to our experimental setting, based on nitrogen-vacancy centers in diamond. Experimentally, we verify the model by generating remote states for varying phase and amplitudes of the initial qubit superposition states and varying optical phase difference of the photons arriving at the beam splitter. We show that a static frequency offset between the optical transitions of the qubits leads to an entangled state phase that depends on the photon detection time. We find that the implementation of a Charge-Resonance check on the nitrogen-vacancy center yields transform-limited linewidths. Moreover, we measure the probability of double optical excitation, a significant source of infidelity, as a function of the power of the excitation pulse. Finally, we find that imperfect optical excitation can lead to a detection-arm-dependent entangled state fidelity and rate. The conclusion presented here are not specific to the nitrogen-vacancy centers used to carry out the experiments, and are therefore readily applicable to other qubit platforms.

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“…While NV centers with close-to lifetime limited optical linewidths have been reported in bulk [288]- [290], NV centers embedded in nanophotonic devices often suffer from poor optical coherence and inhomogeneous broadening of the ZPL linewidth on the account of a fluctuating charge environment caused by fabrication induced surface damage [91], [291]. Therefore, increasing the defect free, crystalline environment has proved to be beneficial [292], [293].…”

Section: B Engineering Of the Photonic Environmentmentioning

confidence: 99%

Diamond Integrated Quantum Nanophotonics: Spins, Photons and Phonons

Shandilya

Flågan

Carvalho

et al. 2022

J. Lightwave Technol.

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Integrated quantum photonics devices in diamond have tremendous potential for many quantum applications, including long-distance quantum communication, quantum information processing, and quantum sensing. These devices benefit from diamond's combination of exceptional thermal, optical, and mechanical properties. Its wide electronic bandgap makes diamond an ideal host for a variety of optical active spin qubits that are key building blocks for quantum technologies. In landmark experiments, diamond spin qubits have enabled demonstrations of remote entanglement, memory-enhanced quantum communication, and multi-qubit spin registers with fault-tolerant quantum error correction, leading to the realization of multinode quantum networks. These advancements put diamond at the forefront of solid-state material platforms for quantum information processing. Recent developments in diamond nanofabrication techniques provide a promising route to further scaling of these landmark experiments towards real-life quantum technologies. In this paper, we focus on the recent progress in creating integrated diamond quantum photonic devices, with particular emphasis on spin-photon interfaces, cavity optomechanical devices, and spin-phonon transduction. Finally, we discuss prospects and remaining challenges for the use of diamond in scalable quantum technologies.

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Quantifying NV-center Spectral Diffusion by Symmetry

Cited by 3 publications

References 45 publications

Modeling of Radiative Emission from Shallow Color Centers in Single Crystalline Diamond

Modeling of Radiative Emission from Shallow Color Centers in Single Crystalline Diamond

Entangling remote qubits using the single-photon protocol: an in-depth theoretical and experimental study

Diamond Integrated Quantum Nanophotonics: Spins, Photons and Phonons

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