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Resonant photon modes of a 5mm diameter YIG sphere loaded in a cylindrical cavity in the 10-30GHz frequency range are characterised as a function of applied DC magnetic field at millikelvin temperatures. The photon modes are confined mainly…

Quantum Physics · Physics 2016-05-04 Jeremy Bourhill , Nikita Kostylev , Maxim Goryachev , Daniel Creedon , Michael Tobar

Coherent coupling between spin wave excitations (magnons) and microwave photons in a cavity may disclose new paths to unconventional phenomena as well as for novel applications. Here, we present a systematic investigation on YIG (Yttrium…

Mesoscale and Nanoscale Physics · Physics 2023-09-06 Alberto Ghirri , Claudio Bonizzoni , Maksut Maksutoglu , Alberto Mercurio , Omar Di Stefano , Salvatore Savasta , Marco Affronte

We demonstrate strong coupling between travelling magnons in an Yttrium Iron Garnet film and 3D microwave cavity photons at milli-Kelvin temperatures. The coupling strength of $350$MHz or $7.3$\% of resonance frequency is observed. The…

Materials Science · Physics 2017-10-19 Maxim Goryachev , Mikhail Kostylev , Michael E. Tobar

Multiple-post reentrant 3D lumped cavity modes have been realized to design the concept of discrete Whispering Gallery and Fabry-Perot-like Modes for multimode microwave Quantum Electrodynamics experiments. Using a magnon spin-wave…

Quantum Physics · Physics 2016-02-11 Nikita Kostylev , Maxim Goryachev , Michael E. Tobar

Coherent conversion from microwave to optical wave opens new research avenues towards long distant quantum network covering quantum communication, computing, and sensing out of the laboratory. Especially multi-mode enabled system is…

Quantum Physics · Physics 2020-07-31 Yong Sup Ihn , Su-Yong Lee , Dongkyu Kim , Sin Hyuk Yim , Zaeill Kim

Single crystal Lithium Ferrite (LiFe) spheres of sub-mm dimension are examined at mK temperatures, microwave frequencies and variable DC magnetic field, for use in hybrid quantum systems and condensed matter and fundamental physics…

Strongly Correlated Electrons · Physics 2018-04-18 Maxim Goryachev , Stuart Watt , Jeremy Bourhill , Mikhail Kostylev , Michael E. Tobar

Several experimental implementations of cavity-magnon systems are presented. First an Yttrium Iron Garnet (YIG) block is placed inside a re-entrant cavity where the resulting hybrid mode is measured to be in the ultra strong coupling…

Quantum Physics · Physics 2019-11-26 Graeme Flower , Maxim Goryachev , Jeremy Bourhill , Michael E. Tobar

The ability to achieve strong-coupling has made cavity-magnon systems an exciting platform for the development of hybrid quantum systems and the investigation of fundamental problems in physics. Unfortunately, current experimental…

Applied Physics · Physics 2020-07-07 C. A. Potts , J. P. Davis

The cross-integration of spin-wave and superconducting technologies is a promising method for creating novel hybrid devices for future information processing technologies to store, manipulate, or convert data in both classical and quantum…

Strong-coupling experiments based on magnons enable the exploration into on-chip demonstrations involving numerous long-lived excitations. Yttrium iron garnet (YIG) has been considered for decades as a gold standard material for magnonics…

Microwave-to-optical conversion via ferromagnetic magnons has so-far been limited by the optical coupling rates achieved in mm-scale whispering gallery mode resonators. Towards overcoming this limitation, we propose and demonstrate an open…

Mesoscale and Nanoscale Physics · Physics 2020-09-10 J. A. Haigh , R. A. Chakalov , A. J. Ramsay

We present a theoretical study of synchronization between two strongly driven magnon modes indirectly coupled via a single-mode microwave cavity. Each magnon mode, hosted in separate Yttrium Iron Garnet spheres, interacts coherently with…

Quantum Physics · Physics 2026-03-03 Jatin Ghildiyal , Shubhrangshu Dasgupta , Asoka Biswas

We demonstrate large normal-mode splitting between a magnetostatic mode (the Kittel mode) in a ferromagnetic sphere of yttrium iron garnet and a microwave cavity mode. Strong coupling is achieved in the quantum regime where the average…

Hybridizing collective spin excitations and a cavity with high cooperativity provides a new research subject in the field of cavity quantum electrodynamics and can also have potential applications to quantum information. Here we report an…

Quantum Physics · Physics 2015-12-04 Dengke Zhang , Xin-Ming Wang , Tie-Fu Li , Xiao-Qing Luo , Weidong Wu , Franco Nori , J. Q. You

In cavity magnonics, magnon-photon hybridization has been widely investigated for both fundamental studies and applications. Planar superconducting resonators operating at microwave frequencies have demonstrated the possibility to achieve…

Superconductivity · Physics 2025-09-11 Alberto Ghirri , Mattia Cavani , Claudio Bonizzoni , Marco Affronte

The cavity-mediated coupling between magnons in an yttrium-iron-garnet (YIG) sphere and a superconducting qubit has recently been demonstrated as a new platform for preparing macroscopic quantum states. Here, based on this system, we…

Quantum Physics · Physics 2026-05-08 Rong-Can Yang , Gang Liu , Gen Li , Jie Li

Hybridized magnonic-photonic systems are key components for future information processing technologies such as storage, manipulation or conversion of data both in the classical (mostly at room temperature) and quantum (cryogenic) regime. In…

Mesoscale and Nanoscale Physics · Physics 2018-05-23 Isabella Boventer , Marco Pfirrmann , Julius Krause , Yannick Schön , Mathias Kläui , Martin Weides

Optomagnonic dielectric resonators offer a promising platform for the bidirectional conversion of microwave and optical photons at the single quantum level. Current implementation of such a conversion lacks from low magneto-optical…

Optics · Physics 2025-09-24 S. S. Demirchyan , D. M. Krichevsky , V. I. Belotelov

We realize a cavity magnon-microwave photon system in which magnetic dipole interaction mediates strong coupling between collective motion of large number of spins in a ferrimagnet and the microwave field in a three-dimensional cavity. By…

Quantum Physics · Physics 2014-10-08 Xufeng Zhang , Chang-Ling Zou , Liang Jiang , Hong X. Tang

We present a scheme to generate distant bipartite and tripartite entanglement between an atomic ensemble and an yttrium iron garnet (YIG) sphere in coupled microwave cavities. We consider an atomic ensemble in a single-mode microwave cavity…

Quantum Physics · Physics 2024-04-15 Dilawaiz , Shahid Qamar , Muhammad Irfan
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