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Volumn 77, Issue 11, 2008, Pages

Shifted conjugate-orthogonal-conjugate-gradient method and its application to double orbital extended hubbard model

Author keywords

Conjugate orthogonal conjugate gradient method; Excitation spectra; Green's function; Large matrix; Multiorbital extended hubbard model; Seed switching; Shifted linear systems

Indexed keywords


EID: 65549140297     PISSN: 00319015     EISSN: 13474073     Source Type: Journal    
DOI: 10.1143/JPSJ.77.114713     Document Type: Article
Times cited : (33)

References (13)
  • 5
    • 84868924001 scopus 로고    scopus 로고
    • n = 0. When this occurs before the approximate solution converges, we fail to obtain the approximate solution. However, we seldom experience such a situation.
    • n = 0. When this occurs before the approximate solution converges, we fail to obtain the approximate solution. However, we seldom experience such a situation.
  • 7
    • 65549163409 scopus 로고    scopus 로고
    • When all the matrices and vectors in the COCG part are real, in the case when n = 0, the real matrix-vector operations should be used because the calculation time is less than half that of the complex operations.
    • When all the matrices and vectors in the COCG part are real, in the case when n = 0, the real matrix-vector operations should be used because the calculation time is less than half that of the complex operations.
  • 8
    • 65549108862 scopus 로고    scopus 로고
    • T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara: in Frontiers of Computational Science: Proc. Int. Symp. Frontiers of Computational Science 2005, ed. Y. Kanada, H. Kawamura, and M. Sasai (Springer-Verlag, Berlin, 2007) p. 189; math/0602652v1.
    • T. Sogabe, T. Hoshi, S.-L. Zhang, and T. Fujiwara: in Frontiers of Computational Science: Proc. Int. Symp. Frontiers of Computational Science 2005, ed. Y. Kanada, H. Kawamura, and M. Sasai (Springer-Verlag, Berlin, 2007) p. 189; math/0602652v1.
  • 11
    • 84868926542 scopus 로고    scopus 로고
    • In the ideal calculation without numerical error, its results do not depend on the value of the reference energy ωref. However, in the actual calculation, they depend on ωref, especially when the smearing factor n is small
    • ref, especially when the smearing factor n is small.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.