Surface-magnon mediated self-interaction of nitrogen-vacancy centers in diamond
Abstract
Hybrid quantum systems consisting of nitrogen-vacancy (NV) centers in diamond and magnons in ferrimagnets have recently attracted much attention as a platform for on-chip long-distance entanglement, interfacing quantum information science with magnonics. Here, we experimentally determine the magnon-induced self-interaction of this hybrid system by combining longitudinal (T1) relaxometry measurements with the fluctuation-dissipation and Kramers-Kronig relations. This self-interaction is a function of the NV-magnon coupling strength and thereby provides an estimate of the magnon-mediated two-qubit interaction. Our results, including the enhanced T1 relaxation rates caused by magnetostatic surface magnons are quantitatively consistent with a model in which the NV center is coupled to magnons by the magnetic dipole interactions. These findings help build a foundation for the hybrid quantum architecture of spin qubits coupled to magnons.
This work was primarily supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.- Publication:
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APS March Meeting Abstracts
- Pub Date:
- 2023
- Bibcode:
- 2023APS..MARN67005F