2026-06-01 東京大学
磁性体中の「熱スクイージング」
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2026-06-01-002
- https://www.nature.com/articles/s41567-026-03294-4
シングルモードおよびツーモードマグノン熱圧縮 Single- and two-mode magnon thermal squeezing
Tomosato Hioki,Kaito Tojo,Mehrdad Elyasi,Sohei Horibe,Hiroki Shimizu,Koujiro Hoshi,Takahiko Makiuchi,Gerrit E. W. Bauer & Eiji Saitoh
Nature Physics Published:01 June 2026
DOI:https://doi.org/10.1038/s41567-026-03294-4
Abstract
Squeezed states play a central role in modern precision measurement and information processing, reducing the noise through manipulating its distributions in phase space. Although squeezing has been explored in various physical systems, realization and characterization in magnetic media remain largely unexplored. Here we demonstrate the single-mode thermal squeezing of the magnetization dynamics in an yttrium iron garnet film using microwave parametric excitation. We also demonstrate two-mode thermal squeezing in the form of correlated fluctuations of magnons concentrated on the top and bottom surfaces of the film. Establishing the control of thermal squeezing in magnetic systems provides insights into the fluctuation dynamics of the magnetic order, and represents a key advance in the quest to observe quantum effects in magnetic films.
