Hybridizing ferromagnetic magnons and microwave photons in the quantum limit.

By Y. Tabuchi, Seiichiro Ishino, T. Ishikawa, R. Yamazaki, K. Usami, Yasunobu Nakamura. Physical Review Letters, 2014

727 citations recorded by the source corpus.

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 number of thermally or externally excited magnons and photons is less than one. We also confirm that the coupling strength is proportional to the square root of the number of spins. A nonmonotonic temperature dependence of the Kittel-mode linewidth is observed below 1 K and is attributed to the dissipation due to the coupling with a bath of two-level systems.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/be45261bb1ca842ec5ea719e0e8eba1cea2a6b00

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

In Electrical and Electronic Engineering

Citations in the corpus

Quantum information processing with superconducting circuits: a review (2016, background): “They recently demonstrated strong coupling between single magnons in a magnetostatic mode in the sphere and a microwave cavity mode [252, 253], including bidirectional conversion [254].”
Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations (2019, unknown): “Strong coupling between magnetostatic modes and cavities has been demonstrated [91, 92, 94], but the cavity must be resonant with the optical FSR, and it is not always straightforward to realize a microwave cavity with a wide tuning range [96, 97].”
Colloquium: Strongly interacting photons in one-dimensional continuum (2016, background): “Finally, collective magnon excitations in macroscopic ferrimagnetic crystals are also being studied as a potential medium for an interface (Tabuchi et al., 2014).”
Ultrahigh cooperativity interactions between magnons and resonant photons in a YIG sphere (2015, background): “Cavities can take oval [3, 4] or spherical shapes [20, 21, 23], and even re-entrant cavities with multiple posts have been used in an attempt to focus the microwave energy over the sphere [5, 22].”