大西弘明 (Hiroaki Onishi)
〒319-1195 茨城県那珂郡東海村大字白方2番地4 日本原子力研究開発機構 先端基礎研究センター
Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, JAPAN
Introduction:
I am a research scientist working on condensed matter theory. I am broadly interested in:- strongly correlated electron systems
- orbital physics
- itinerant ferromagnetism
- low-dimeisional magnetism
- geometrical frustration
- transport properties of nanostructures
- cold atoms in optical lattices
- computational physics
- quantum computation
More specifically, I have studied spin-orbital ordering and its dynamics in strongly correlated electron systems with orbital degeneracy, itinerant ferromagnetism, and quantum spin magnetism in low dimensions. I have tackled these research subjects by exploiting various numerical methods such as DMRG, time-dependent DMRG, dynamical DMRG, exact diagonalization, thermal pure quantum state, and QMC loog algorithm.
Topics:
JPSJ Papers of Editors' Choice"Magnetic Excitations of Spin Nematic State in Frustrated Ferromagnetic Chain"
Hiroaki Onishi
J. Phys. Soc. Jpn. 84, 083702 (2015).
JPSJ Papers of Editors' Choice
"Magnetic Excitation in the S=1/2 Ising-like Antiferromagnetic Chain CsCoCl3 in Longitudinal Magnetic Fields Studied by High-field ESR Measurements"
Shojiro Kimura, Hiroaki Onishi, Kouichi Okunishi, Mitsuru Akaki, Yasuo Narumi, Masayuki Hagiwara, Koichi Kindo, and Hikomitsu Kikuchi
J. Phys. Soc. Jpn. 92, 094701 (2023).
Contact:
Research Group for Spin-Energy Science,Advanced Science Research Center,
Japan Atomic Energy Agency,
Tokai, Ibaraki 319-1195, JAPAN
E-mail: onishi.hiroaki [-AT-] jaea.go.jp
Access: English / Japanese