Machine learning as an improved estimator for magnetization curve and spin gap
Machine learning as an improved estimator for magnetization curve and spin gap
复制标题
机器学习作为磁化曲线和自旋间隙的改进估计器
DOI:
10.1038/s41598-020-70389-0
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发表时间:
2020
影响因子:
4.6
通讯作者:
Nakamura Tota
中科院分区:
文献类型:
--
作者:
Shogo Kato;Toshinao Yoshiba and Shinto Eguchi;Buscemi Francesco;M. Hirokawa;Nakamura Tota
The magnetization process is a very important probe to study magnetic materials, particularly in search of spin-liquid states in quantum spin systems. Regrettably, however, progress of the theoretical analysis has been unsatisfactory, mostly because it is hard to obtain sufficient numerical data to support the theory. Here we propose a machine-learning algorithm that produces the magnetization curve and the spin gap well out of poor numerical data. The plateau magnetization, its critical field and the critical exponent are estimated accurately. One of the hyperparameters identifies by its score whether the spin gap in the thermodynamic limit is zero or finite. After checking the validity for exactly solvable one-dimensional models we apply our algorithm to the kagome antiferromagnet. The magnetization curve that we obtain from the exact-diagonalization data with 36 spins is consistent with the DMRG results with 132 spins. We estimate the spin gap in the thermodynamic limit at a very small but finite value.
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DOI:
10.1017/cbo9780511524332.002
发表时间:
1999-03
期刊:
--
影响因子:
--
作者:
Minoru Takahashi
通讯作者:
Minoru Takahashi
影响因子:
56.9
作者:
Carleo, Giuseppe;Troyer, Matthias
通讯作者:
Troyer, Matthias
影响因子:
1.7
作者:
H. Nakano;T. Sakai
通讯作者:
T. Sakai
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
M. Hanawa;A. Ichinose;S. Komiya;I. Tsukada;Y. Imai;A. Maeda;H. Tanaka
通讯作者:
H. Tanaka
DOI:
--
发表时间:
1968
期刊:
--
影响因子:
--
作者:
V. Kontorovich;V. Tsukernik
通讯作者:
V. Tsukernik