Ultrafast Orbital Depolarization and Defect-Localized Phonon Dynamics Induced by Quantum Resonance between...

Area of Science:

• Quantum physics
• Materials science
• Nanotechnology

Background:

• Nitrogen-vacancy (NV) defects are promising for quantum applications.
• Interactions between proximate NV defects can lead to novel quantum phenomena.
• Understanding these interactions is crucial for developing quantum qubit networks.

Purpose of the Study:

• To investigate real-time depolarization and phonon dynamics in proximate multi-NV defects at ambient temperature.
• To computationally demonstrate the effects of quantum resonance (QR) on NV defect properties.
• To elucidate the physical mechanisms and control factors of QR in NV defect systems.

Main Methods:

• Computational modeling of multi-NV defect systems.
• Analysis of excited-state dynamics, including depolarization and phonon interactions.
• Investigation of quantum resonance (QR) induction via critical distance and orientation.

Main Results:

• Quantum resonance (QR) significantly alters NV defect properties: orbital degeneracy, delocalization, local phonon modes, and electron-phonon coupling.
• Real-time depolarization and phonon dynamics on the excited state were characterized.
• Key factors controlling these dynamics were identified.

Conclusions:

• Quantum resonance (QR) offers a new pathway for manipulating proximate NV defects.
• The findings provide insights for precise NV defect positioning and creation protocols.
• This research has broad implications for quantum information, sensing, and spectroscopy.