Improving the lifetime of the NV center ensemble coupled with a superconducting flux qubit by applying magnetic fields

Abstract

One of the promising systems to realize quantum computation is a hybrid system where a superconducting flux qubit plays a role of a quantum processor and the NV center ensemble is used as a quantum memory. We have theoretically and experimentally studied the effect of magnetic fields on this hybrid system, and found that the lifetime of the vacuum Rabi oscillation is improved by applying a few mT magnetic field to the NV center ensemble. Here, we construct a theoretical model to reproduce the vacuum Rabi oscillations with/without magnetic fields applied to the NV centers, and we determine the reason why magnetic fields can affect the coherent properties of the NV center ensemble. From our theoretical analysis, we quantitatively show that the magnetic fields actually suppress the inhomogeneous broadening from the strain in the NV centers.

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Cited by in corpus (15)

• Observation of collective coupling between an engineered ensemble of macroscopic artificial atoms and a superconducting resonator
• Optically detected magnetic resonance of high-density ensemble of NV centers in diamond
• Optimization temperature sensitivity using the optically detected magnetic resonance spectrum of a nitrogen-vacancy center ensemble
• Vector magnetic field sensing via multi-frequency control of nitrogen-vacancy centers in diamond
• Efficient detection of inhomogeneous magnetic fields from a single spin with Dicke states
• Quantum annealing with twisted fields
• Quantum battery based on superabsorption
• Impact of helium ion implantation dose and annealing on dense near-surface layers of NV centers
• Entangled microwaves as a resource for entangling spatially separate solid-state qubits: superconducting qubits, NV centers and magnetic molecules
• Nuclear magnetic resonance spectroscopy with a superconducting flux qubit
• Control of all the transitions between ground state manifolds of nitrogen vacancy centers in diamonds by applying external magnetic driving fields
• Cross-entangling electronic and nuclear spins of distant nitrogen-vacancy centers in noisy environments by means of quantum microwave radiation
• Analysis of the spectroscopy of a hybrid system composed of a superconducting flux qubit and diamond NV centers
• Polarizing electron spins with a superconducting flux qubit
• Electrical Control for Extension of Ramsey Spin Coherence Time of Ion-Implanted Nitrogen Vacancy Centers in diamond