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Single-Spin Magnetomechanics with Levitated Micromagnets.
J Gieseler1, A Kabcenell1, E Rosenfeld1
1Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA.
Physical Review Letters
|May 9, 2020
Summary
This study introduces a novel mechanical transduction platform for spin qubits. It uses trapped micromagnets to enable direct magnetic coupling for quantum applications.
Area of Science:
- Quantum physics
- Quantum computing
- Nanotechnology
Background:
- Individual spin qubits are crucial for quantum information processing.
- Interfacing qubits with mechanical systems offers new avenues for quantum control and sensing.
Purpose of the Study:
- To develop a new mechanical transduction platform for individual spin qubits.
- To enable direct magnetic coupling between micromagnets and spin qubits.
- To explore applications in quantum mechanics, quantum networks, and metrology.
Main Methods:
- Trapping single micromagnets using a type-II superconductor near spin qubits.
- Controlling magnet-superconductor distance during cooldown for 3D trapping.
- Coupling mechanical oscillator motion to nitrogen vacancy center spin degrees of freedom.
Main Results:
- Demonstrated 3D trapping of micromagnets with quality factors ~1x10^6.
- Achieved kHz trapping frequencies for the mechanical oscillator.
- Successfully coupled mechanical motion to individual spin qubits.
Conclusions:
- The developed platform enables direct magnetic coupling between mechanical oscillators and spin qubits.
- This approach offers a new pathway for quantum mechanics experiments with mesoscopic objects.
- Potential applications include quantum networks and ultrasensitive metrology.
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