Learning the Effective Spin Hamiltonian of a Quantum Magnet

doi:10.1088/0256-307X/38/9/097502

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Learning the Effective Spin Hamiltonian of a Quantum Magnet
	Yu, Sizhuo ; Gao, Yuan ; Chen, Bin-Bin ; Li, Wei 1
刊名	CHINESE PHYSICS LETTERS
	2021
卷号	38 期号:9 页码:97502
关键词	MATRIX RENORMALIZATION-GROUP CHAIN THERMODYNAMICS EXCITATIONS STATE
ISSN号	0256-307X
DOI	10.1088/0256-307X/38/9/097502
英文摘要	To understand the intriguing many-body states and effects in the correlated quantum materials, inference of the microscopic effective Hamiltonian from experiments constitutes an important yet very challenging inverse problem. Here we propose an unbiased and efficient approach learning the effective Hamiltonian through the many-body analysis of the measured thermal data. Our approach combines the strategies including the automatic gradient and Bayesian optimization with the thermodynamics many-body solvers including the exact diagonalization and the tensor renormalization group methods. We showcase the accuracy and powerfulness of the Hamiltonian learning by applying it firstly to the thermal data generated from a given spin model, and then to realistic experimental data measured in the spin-chain compound copper nitrate and triangular-lattice magnet TmMgGaO4. The present automatic approach constitutes a unified framework of many-body thermal data analysis in the studies of quantum magnets and strongly correlated materials in general.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27630]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Beihang Univ, Sch Phys, Beijing 100191, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yu, Sizhuo,Gao, Yuan,Chen, Bin-Bin,et al. Learning the Effective Spin Hamiltonian of a Quantum Magnet[J]. CHINESE PHYSICS LETTERS,2021,38(9):97502.
APA	Yu, Sizhuo,Gao, Yuan,Chen, Bin-Bin,&Li, Wei.(2021).Learning the Effective Spin Hamiltonian of a Quantum Magnet.CHINESE PHYSICS LETTERS,38(9),97502.
MLA	Yu, Sizhuo,et al."Learning the Effective Spin Hamiltonian of a Quantum Magnet".CHINESE PHYSICS LETTERS 38.9(2021):97502.