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• W2051775152 abstract "The symmetric heavy-light ansatz is a method for finding the ground state of any dilute unpolarized system of attractive two-component fermions. Operationally it can be viewed as a generalization of the Kohn-Sham equations in density functional theory applied to N-body density correlations. While the original Hamiltonian has an exact Z_2 symmetry, the heavy-light ansatz breaks this symmetry by skewing the mass ratio of the two components. In the limit where one component is infinitely heavy, the many-body problem can be solved in terms of single-particle orbitals. The original Z_2 symmetry is recovered by enforcing Z_2 symmetry as a constraint on N-body density correlations for the two components. For the 1D, 2D, and 3D attractive Hubbard models the method is in very good agreement with exact Lanczos calculations for few-body systems at arbitrary coupling. For the 3D attractive Hubbard model there is very good agreement with lattice Monte Carlo results for many-body systems in the limit of infinite scattering length." @default.
• W2051775152 created "2016-06-24" @default.
• W2051775152 creator A5086302165 @default.
• W2051775152 date "2008-02-01" @default.
• W2051775152 modified "2023-09-26" @default.
• W2051775152 title "The symmetric heavy-light ansatz" @default.
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• W2051775152 doi "https://doi.org/10.1140/epja/i2008-10537-2" @default.
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