Electrical Control of Coherent Spin Rotation of a Single-Spin Qubit

TL;DR

This paper demonstrates electrical control of single NV center spin qubits in diamond, enabling scalable, energy-efficient quantum operations and paving the way for advanced quantum information systems.

Contribution

It introduces a method to electrically tune the spin rotation rate of NV center qubits using spin currents, a novel approach for scalable quantum control.

Findings

Electrical tuning of NV spin Rabi oscillations achieved.

Coupling between NV centers and spin waves demonstrated.

Potential for scalable quantum networks highlighted.

Abstract

Nitrogen vacancy (NV) centers, optically-active atomic defects in diamond, have attracted tremendous interest for quantum sensing, network, and computing applications due to their excellent quantum coherence and remarkable versatility in a real, ambient environment. One of the critical challenges to develop NV-based quantum operation platforms results from the difficulty to locally address the quantum spin states of individual NV spins in a scalable, energy-efficient manner. Here, we report electrical control of the coherent spin rotation rate of a single-spin qubit in NV-magnet based hybrid quantum systems. By utilizing electrically generated spin currents, we are able to achieve efficient tuning of magnetic damping and the amplitude of the dipole fields generated by a micrometer-sized resonant magnet, enabling electrical control of the Rabi oscillation frequency of NV spins. Our results highlight the potential of NV centers in designing functional hybrid solid-state systems for next-generation quantum-information technologies. The demonstrated coupling between the NV centers and the propagating spin waves harbored by a magnetic insulator further points to the possibility to establish macroscale entanglement between distant spin qubits.