State tomography for magnetization dynamics

Tomosato Hioki, Hiroki Shimizu, Takahiko Makiuchi, Eiji Saitoh

Research output: Contribution to journalArticlepeer-review

Abstract

State tomography is an essential tool for analyzing physical states in quantum science. In magnets, elementary excitation called a magnon, or a spin wave, dominates magnetization dynamics and various magnetic properties. Here, we propose and demonstrate state tomography for magnetization dynamics, enabling us to obtain a density matrix and Wigner function of the magnetization dynamics. Using the technique, we found that parametrically excited magnons can form a mixed state composed of two coherent states. Magnetization state tomography will pave a way to explore a wide range of states of magnons, such as a squeezed state in condensed matter.

Original languageEnglish
Article numberL100419
JournalPhysical Review B
Volume104
Issue number10
DOIs
Publication statusPublished - 2021 Sep 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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