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- W2058003310 abstract "We present a mapping of elementary fermion operators onto a quadratic form of composite fermionic and bosonic operators. The mapping is an exact isomorphism as long as the physical constraint of one composite particle per cluster is satisfied. This condition is treated on average in a composite particle mean-field approach, which consists of an ansatz that decouples the composite fermionic and bosonic sectors. The theory is tested on the one- and two-dimensional Hubbard models. Using a Bogoliubov determinant for the composite fermions and either a coherent or Bogoliubov state for the bosons, we obtain a simple and accurate procedure for treating the Mott insulating phase of the Hubbard model with mean-field computational cost." @default.
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- W2058003310 date "2014-10-16" @default.
- W2058003310 modified "2023-09-25" @default.
- W2058003310 title "Composite fermion-boson mapping for fermionic lattice models" @default.
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- W2058003310 doi "https://doi.org/10.1088/0953-8984/26/45/455601" @default.
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