Cavity-mediated coherent coupling of magnetic moments
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Authors
Lambert, NJ
Haigh, JA
Langenfeld, S
Doherty, AC
Ferguson, AJ
Abstract
We demonstrate the long range strong coupling of magnetostatic modes in spatially separated ferromagnets mediated by a microwave frequency cavity. Two spheres of yttrium iron garnet are embedded in the cavity and their magnetostatic modes probed using a dispersive measurement technique. We find they are strongly coupled to each other even when detuned from the cavity modes, and investigate the dependence of the magnet-magnet coupling on the cavity detuning. Dark states of the coupled magnetostatic modes of the system are observed, and ascribed to mismatches between the symmetries of the modes and the drive field.
Description
Keywords
5108 Quantum Physics, 51 Physical Sciences, Brain Disorders
Journal Title
Physical Review A
Conference Name
Journal ISSN
2469-9926
2469-9934
2469-9934
Volume Title
93
Publisher
American Physical Society (APS)
Publisher DOI
Sponsorship
Engineering and Physical Sciences Research Council (EP/K027018/1)
European Research Council (648613)
European Research Council (648613)
We would like to acknowledge support from Hitachi Cambridge Laboratory, EPSRC Grant No. EP/K027018/1 and ERC Grant No. 648613. A.J.F. is supported by a Hitachi Research Fellowship. A.C.D. is supported by the ARC via the Centre of Excellence in Engineered Quantum Systems (EQuS), Project No. CE110001013.