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Stability of Insulating Phases in the Hubbard Model: a Cluster Expansion | | K. Ziegler
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14 Oct 1993 | | Subject: | cond-mat | | Abstract: | The stability of the insulating regime of the Hubbard model on a $d$-dimensional lattice, which is characterized by an exponential decay of the Green’s functions, is investigated in terms of a cluster expansion. This expansion for the Green’s function is organized in terms of connected clustered transfer matrices. An upper bound for the expansion terms is derived for the hopping rate ${ar t}$ depending on the coupling constant $U$ as ${ar t} | | Source: | arXiv, cond-mat/9310031 | | Services: | Forum | Review | PDF | Favorites | |
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