validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel

	validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel
	Yun Sujun 1; Dong Tiekuang2 ; Zhu Shining 3
刊名	chinesephysicsletters
	2017
卷号	34 期号:8 页码:5
ISSN号	0256-307X
英文摘要	To validate the ability of full configuration interaction quantum monte carlo (fciqmc) for studying the 2d hubbard model near half-filling regime, the ground state energies of a 4 x 4 square lattice system with various interaction strengths are calculated. it is found that the calculated results are in good agreement with those obtained by exact diagonalization (i.e., the exact values for a given basis set) when the population of psi particles (psips) is higher than the critical population required to correctly sample the ground state wave function. in addition, the variations of the average computational time per 20 monte carlo cycles with the coupling strength and the number of processors are also analyzed. the calculated results show that the computational efficiency of an fciqmc calculation is mainly affected by the total population of psips and the communication between processors. these results can provide useful references for understanding the fciqmc algorithm, studying the ground state properties of the 2d hubbard model for the larger system size by the fciqmc method and using a computational budget as effectively as possible.
语种	英语
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/31924]
专题	中国科学院紫金山天文台
作者单位	1.南京晓庄学院 2.中国科学院紫金山天文台 3.南京大学
推荐引用方式 GB/T 7714	Yun Sujun,Dong Tiekuang,Zhu Shining. validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel[J]. chinesephysicsletters,2017,34(8):5.
APA	Yun Sujun,Dong Tiekuang,&Zhu Shining.(2017).validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel.chinesephysicsletters,34(8),5.
MLA	Yun Sujun,et al."validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel".chinesephysicsletters 34.8(2017):5.