Strong magnon–photon coupling within a tunable cryogenic microwave cavity

Potts, C. A.; Davis, J. P.

doi:10.1063/5.0015660

Cited by 40 publications

(23 citation statements)

References 34 publications

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“…Conventionally, a spectrum of a hybrid system that consists of two coupled harmonic oscillators contains only two anti-crossing lines (13,14,16,20). However, in case of sufficiently strong coupling, the spectrum can incorporate additional lines in the range between the anti-crossing lines that appear as a result of hybridization of higher-order photon or magnon modes (14,17,18,42,43). Additional studies at temperatures in proximity to T c do not confirm the presence of higher-order Swihart resonance modes.…”

Section: Resultsmentioning

confidence: 97%

“…3) and the coupling . A more advanced analysis of the spectrum can be performed with the input-output theory [see, for instance, (14,19,20,35,42)], which provides the decay rates of resonators in addition to the resonance frequencies and the coupling. However, rather weak signals and the presence of background resonances do not allow us to attempt such analysis in this work.…”

Section: Resultsmentioning

confidence: 99%

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Ultrastrong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers

et al. 2021

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The critical step for future quantum industry demands realization of efficient information exchange between different-platform hybrid systems that can harvest advantages of distinct platforms. The major restraining factor for the progress in certain hybrids is weak coupling strength between the elemental particles. In particular, this restriction impedes a promising field of hybrid magnonics. In this work, we propose an approach for realization of on-chip hybrid magnonic systems with unprecedentedly strong coupling parameters. The approach is based on multilayered microstructures containing superconducting, insulating, and ferromagnetic layers with modified photon phase velocities and magnon eigenfrequencies. The enhanced coupling strength is provided by the radically reduced photon mode volume. Study of the microscopic mechanism of the photon-to-magnon coupling evidences formation of the long-range superconducting coherence via thick strong ferromagnetic layers in superconductor/ferromagnet/superconductor trilayer in the presence of magnetization precession. This discovery offers new opportunities in microwave superconducting spintronics for quantum technologies.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Ultrastrong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers

et al. 2021

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“…(2) Another approach for detuning tuning is to utilize frequency-tunable resonators to couple with magnons. For instance, the resonator can be integrated with high-speed mechanical components [508] such as micro-or nanoelectromechanical systems (MEMS or NEMS), tunable kirigami or origami structures, etc.…”

Section: Manipulating Hybrid Magnonic Interactionsmentioning

confidence: 99%

Advances in Magnetics Roadmap on Spin-Wave Computing

et al. 2022

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Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS are just a few of many advantages offered by magnons. Although magnonics is still primarily positioned in the academic domain, the scientific and technological challenges of the field are being extensively investigated, and many proof-of-concept prototypes have already been realized in laboratories. This roadmap is a product of the collective work of many authors that covers versatile spin-wave computing approaches, conceptual building blocks, and underlying physical phenomena. In particular, the roadmap discusses the computation operations with Boolean digital data, unconventional approaches like neuromorphic computing, and the progress towards magnon-based quantum computing. The article is organized as a collection of sub-sections grouped into seven large thematic sections. Each sub-section is prepared by one or a group of authors and concludes with a brief description of current challenges and the outlook of further development for each research direction.

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“…Hybrid quantum systems have attracted great attentions due to their diversified applications in quantum computing [1], quantum communications [2], and quantum sensing [3]. During the past decade, the hybrid quantum systems consisting of the collective spin excitations in the ferromagnetic crystals have been applied to novel quantum technologies [4][5][6][7][8][9] by virtue of the long coherent-time of the magnet-spin ensemble. The strong dipole-transition for efficiently coupling to the microwave photons and phonons allows the construction of the hybrid magnon-photon, magnon-phonon, and magnon-photon-phonon systems in both theoretical proposals [10][11][12] and experimental demonstrations [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Generation of Bell and GHZ states from a hybrid qubit-photon-magnon system

Qi,

Jing

2021

Preprint

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We propose a level-resolved protocol in a hybrid architecture for connecting a superconducting qubit and a magnon mode contained within a microwave cavity (resonator) to generate the local and global entangled states, enabling a wide range of applications in quantum communication, quantum metrology, and quantum information processing. Exploiting the high-degree of controllability in such a hybrid qubit-photon-magnon system, we derive effective Hamiltonians at the second-or the thirdorder resonant points by virtue of the strong counter-rotating interactions between the resonator and the qubit and between the resonator and the magnon. Consequently, we can efficiently generate the Bell states of the photon-magnon and the qubit-magnon subsystems and the Greenberger-Horne-Zeilinger state of the whole hybrid system. We also check the robustness of our protocol against the environmental noise by the Lindblad master equation. Our work makes this hybrid platform of high-degree of controllability a high-fidelity candidate for the realization of the maximally-entangled multiple states.

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Strong magnon–photon coupling within a tunable cryogenic microwave cavity

Cited by 40 publications

References 34 publications

Ultrastrong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers

Ultrastrong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers

Advances in Magnetics Roadmap on Spin-Wave Computing

Generation of Bell and GHZ states from a hybrid qubit-photon-magnon system

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