The Density Matrix Renormalization Group for Fermion Systems
凝聚态物理
2007-05-23 v1
摘要
We discuss techniques of the density matrix renormalization group and their application to interacting fermion systems in more than one dimension. We show numerical results for equal--time spin--spin and singlet pair field correlation functions, as well as the spin gap for the Hubbard model on two chains. The system is a gapped spin liquid at half--filling and shows weak algebraic -wave--like pair field correlations away from half--filling.
引用
@article{arxiv.cond-mat/9404100,
title = {The Density Matrix Renormalization Group for Fermion Systems},
author = {R. M. Noack and S. R. White and D. J. Scalapino},
journal= {arXiv preprint arXiv:cond-mat/9404100},
year = {2007}
}
备注
15 pages and 7 postscript figures, LaTeX Article style, to appear in ``Computer Simulations in Condensed Matter Physics VII'', Eds. D.P. Landau, K.K. Mon, and H.B. Sch\"uttler (Spinger Verlag, Heidelberg, Berlin, 1994), UCI-CMTHE-94-03