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Spin Dynamics of a Solid-State Qubit in Proximity to a Superconductor
Richard Monge1,2, Tom Delord1, Nicholas V Proscia1
1Department. of Physics, CUNY-City College of New York, New York, New York10031, United States.
Nano Letters
|January 5, 2023
Summary
Researchers explored the interaction between superconductors and nitrogen-vacancy (NV) centers. The superconductor enhanced NV spin coherence, enabling new imaging techniques for superconducting materials.
Area of Science:
- Quantum physics
- Materials science
- Solid-state physics
Background:
- Interactions between superconductors and spin-active color centers are crucial for hybrid quantum devices.
- The influence of the color center's host environment on these interactions is often overlooked.
Purpose of the Study:
- To investigate the spin dynamics of a single nitrogen-vacancy (NV) center near a superconducting film.
- To explore the potential for NV centers in imaging superconducting materials.
Main Methods:
- Utilized a diamond scanning probe to study a single NV center proximal to a superconducting film.
- Analyzed changes in NV spin coherence lifetime in the presence of the superconductor.
Main Results:
- Observed an increased NV spin coherence lifetime near the superconductor.
- Tentatively attributed this to altered electric noise from superconductor-induced charge carrier redistribution.
- Demonstrated transverse-relaxation-time-weighted imaging of the superconductor film.
Conclusions:
- The study illuminates the dynamics of shallow NV spin coherence near superconductors.
- Findings suggest new avenues for noise spectroscopy and imaging of superconducting materials.
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