Ring exchange and correlated fermions
نویسندگان
چکیده
منابع مشابه
Functional Integrals for Correlated Fermions
Functional integral methods provide a way to define mean–field theories and to systematically improve them. For the Hubbard model and similar strong–correlation problems, methods based in particular on the Hubbard–Stratonovich transformation have however been plagued by difficulties to formulate the problem in a spin–rotation invariant way. Here a formalism circumventing this problem by using a...
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ژورنال
عنوان ژورنال: Journal of Physics and Chemistry of Solids
سال: 2005
ISSN: 0022-3697
DOI: 10.1016/j.jpcs.2005.05.065