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A Periodic Small-Cluster Approach to Many-Body Problems
Abstract Many-body problems can very seldom be solved exactly, and their study normally requires approximate methods1. These approximations are of various kinds and accuracy, but usually they involve either a perturbation treatment, or a variational approach. The method employed also depends on whether the problem under study is a real or realistic system (e.g. the ferromagnetism of the surface of the ordered FeCo alloy2; the photoemission spectrum of nickel metal3; the thermal energy gap4 of semiconducting Si) or a prototype, ideal model (e.g. the free-electron gas1,5,6; the one-dimensional Hubbard model7,8; the square-lattice Hubbard model9; the single-center Anderson impurity model10,11).
A Periodic Small-Cluster Approach to Many-Body Problems
Abstract Many-body problems can very seldom be solved exactly, and their study normally requires approximate methods1. These approximations are of various kinds and accuracy, but usually they involve either a perturbation treatment, or a variational approach. The method employed also depends on whether the problem under study is a real or realistic system (e.g. the ferromagnetism of the surface of the ordered FeCo alloy2; the photoemission spectrum of nickel metal3; the thermal energy gap4 of semiconducting Si) or a prototype, ideal model (e.g. the free-electron gas1,5,6; the one-dimensional Hubbard model7,8; the square-lattice Hubbard model9; the single-center Anderson impurity model10,11).
A Periodic Small-Cluster Approach to Many-Body Problems
Falicov, L. M. (author)
Recent Progress in Many-Body Theories ; 1 ; 275-282
1988-01-01
8 pages
Article/Chapter (Book)
Electronic Resource
English
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