State tomography for magnetization dynamics
Tomosato Hioki, Hiroki Shimizu, Takahiko Makiuchi, Eiji Saitoh
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.
Topics & Concepts
MagnetizationMagnetization dynamicsMagnonPhysicsOrbital magnetizationCondensed matter physicsExcited stateExcitationQuantum tomographyQuantum stateQuantum mechanicsMagnetic fieldQuantumMagnetic anisotropyFerromagnetismMagnetic properties of thin filmsQuantum and electron transport phenomenaNeural Networks and Reservoir Computing