First principles study of charge diffusion between proximate solid state qubits and its implications on sensor applications

Abstract

Solid state qubits from paramagnetic point defects in solids are promising platforms to realize quantum networks and novel nanoscale sensors. Recent advances in materials engineering make possible to create proximate qubits in solids that might interact with each other, leading to electron spin/charge fluctuation. Here we develop a method to calculate the tunneling-mediated charge diffusion between point defects from first principles, and apply it to nitrogen-vacancy (NV) qubits in diamond. The calculated tunneling rates are in quantitative agreement with previous experimental data. Our results suggest that proximate neutral and negatively charged NV defect pairs can form an NV--NV molecule. A tunneling-mediated model for the source of decoherence of the near-surface NV qubits is developed based on our findings on the interacting qubits in diamond.

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References in corpus (14)

• Observation of discrete time-crystalline order in a disordered dipolar many-body system
• Unconditional quantum teleportation between distant solid-state qubits
• Chip-scale nanofabrication of single spins and spin arrays in diamond
• Ab initio supercell calculations on nitrogen-vacancy center in diamond: its electronic structure and hyperfine tensors
• Nanoscale NMR Spectroscopy and Imaging of Multiple Nuclear Species
• Spectroscopy of Surface-Induced Noise Using Shallow Spins in Diamond
• Phonon-Induced Population Dynamics and Intersystem Crossing in Nitrogen-Vacancy Centers
• Proton magnetic resonance imaging with a nitrogen-vacancy spin sensor
• Decoherence of near-surface nitrogen-vacancy centers due to electric field noise
• Depolarization dynamics in a strongly interacting solid-state spin ensemble
• Double-quantum spin-relaxation limits to coherence of near-surface nitrogen-vacancy centers
• Scanning probe microscopy with chemical contrast by nanoscale nuclear magnetic resonance
• Superresolution optical magnetic imaging and spectroscopy using individual electronic spins in diamond
• Coherence times of precisely depth controlled NV centers in diamond

Cited by in corpus (6)

• Identifying and mitigating charge instabilities in shallow diamond nitrogen-vacancy centers
• Selective measurement of charge dynamics in an ensemble of nitrogen-vacancy centers in nano- and bulk diamonds
• Charge qubit in van der Waals heterostructures
• Photoinduced charge injection from shallow point defects in diamond into water
• Cooperative dynamic polaronic picture of diamond color centers
• Magnon Condensation in a Dense Nitrogen-Vacancy Spin Ensemble