Twisted boundary conditions and effective mass in Heisenberg-Ising and Hubbard rings.
作者： B. Sriram Shastry , Bill Sutherland
DOI: 10.1103/PHYSREVLETT.65.243
关键词:
摘要: We identify the boundary energy of a many-body system fermions on lattice under twisted conditions as inverse effective charge-carrying mass, or stiffness, renormalizing nontrivially interactions due to absence Galilean invariance. point out that this quantity is sensitive and direct probe metal-insulator transitions possible in these systems, i.e., Mott-Hubbard transition Density-wave formation. calculate exactly 1D Heisenberg-Ising ring Hubbard model by using ansatz Bethe. For we also spin stiffness extending nested Bethe-Yang case.
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