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validationoftheabilityoffullconfigurationinteractionquantummontecarloforstudyingthe2dhubbardmodel
Yun Sujun1; Dong Tiekuang2; Zhu Shining3
2017
Source Publicationchinesephysicsletters
ISSN0256-307X
Volume34Issue:8Pages:5
AbstractTo 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.
Language英语
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/31925
Collection中国科学院紫金山天文台
Affiliation1.南京晓庄学院
2.中国科学院紫金山天文台
3.南京大学
Recommended Citation
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.
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