Sensing at the Nanoscale Using Nitrogen-Vacancy Centers in Diamond: A Model for a Quantum Pressure Sensor

Area of Science:

• Quantum Sensing
• Materials Science
• Solid-State Physics

Background:

• High-resolution stress sensing is crucial for subsurface scanning, CO2 storage, and resource recovery.
• Existing optical sensing methods have limitations in extreme environments.

Purpose of the Study:

• Investigate a novel quantum sensing approach using diamond nitrogen-vacancy (NV) centers for high-pressure detection.
• Develop a quantum manometer for advanced sensing applications.

Main Methods:

• Utilized first-principles density functional theory (DFT) and low-energy Hamiltonian modeling.
• Computationally explored strain effects on NV center electronic properties in diamond.
• Quantified energy level shifts and splits in the NV center's spin manifold.

Main Results:

• Predicted pressure sensing up to 0.3 MPa/Hz using spin dephasing time.
• Demonstrated the quantum sensing approach's superiority over traditional optical methods.
• Developed a theoretical model for stress-induced energy level shifts in NV centers.

Conclusions:

• The proposed quantum manometer offers high sensitivity and resolution for extreme pressure environments.
• This technology has broad applicability in geophysics, material science, and superconductivity research.
• Opens new avenues for advanced sensing technologies beyond current capabilities.