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- W3033819107 abstract "We identify the boundary energy of a many-body system of fermions on a lattice under twisted boundary conditions as the inverse of the effective charge-carrying mass, or the stiffness, renormalizing nontrivially under interactions due to the absence of Galilean invariance. We point out that this quantity is a sensitive and direct probe of the metal-insulator transitions possible in these systems, i.e., the Mott-Hubbard transition or Density-wave formation. We calculate exactly the stiffness, or the effective mass, in the 1D Heisenberg-Ising ring and the 1D Hubbard model by using the ansatz of Bethe. For the Hubbard ring we also calculate a spin stiffness by extending the nested ansatz of Bethe-Yang to this case." @default.
- W3033819107 created "2020-06-12" @default.
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- W3033819107 date "1994-05-01" @default.
- W3033819107 modified "2023-09-26" @default.
- W3033819107 title "Twisted Boundary Conditions and Effective Mass in Heisenberg-Ising and Hubbard Rings" @default.
- W3033819107 doi "https://doi.org/10.1142/9789812798268_0024" @default.
- W3033819107 hasPublicationYear "1994" @default.
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