Ground state wave functions for single-band Hubbard models from the Gutzwiller conjugate gradient minimisation theory
Ground state wave functions for single-band Hubbard models from the Gutzwiller conjugate gradient minimisation theory
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DOI：
10.1080/00268976.2020.1797917
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发表时间：
2020-07
影响因子：
1.7
通讯作者：
Z. Ye;Feng Zhang;Yongxin Yao;Caizhuang Wang;K. Ho
中科院分区：
文献类型：
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作者：
Z. Ye;Feng Zhang;Yongxin Yao;Caizhuang Wang;K. Ho
Gutzwiller共轭梯度最小化（GCGM）理论是一种用于计算无限系统基态性质的从头算量子多体理论。以往的应用表明，GCGM对Hubbard模型的基态能量具有较好的精度。在当前的工作中，我们通过将相关函数与基准数据进行比较，解决了获得的波函数是否很好地逼近真实基态的问题。我们的结果证实了常规哈伯德模型再现基态的准确性，但对受挫哈伯德模型有一些例外。图形抽象
The Gutzwiller conjugate gradient minimisation (GCGM) theory is an ab initio quantum many-body theory for computing the ground-state properties of infinite systems. Previous applications of GCGM provides satisfying accuracy of ground-state energy of Hubbard models. In the current work, we address the problem of whether the obtained wave function is a good approximation for the true ground state by comparing the correlation functions with the benchmark data. Our results confirms the accuracy of the reproduced ground state of the regular Hubbard model, but with some exception for the frustrated Hubbard model. GRAPHICAL ABSTRACT