A new class of exactly solvable interacting fermion models in one dimension

Details A new class of exactly solvable interacting fermion models in one dimension A new class of exactly solvable interacting fermion models in one dimension

1997-07-12

arxiv.org/abs/cond-mat/9707135v2

Phys.Rev.Lett. 80 (1998) 1924

Physics

Condensed Matter

11 pages, revtex 3.0, no figures, some typos corrected

Scientific paper

10.1103/PhysRevLett.80.1924

We investigate a model containing two species of one-dimensional fermions interacting via a gauge field determined by the positions of all particles of the opposite species. The model can be solved exactly via a simple unitary transformation. Nevertheless, correlation functions exhibit nontrivial interaction-dependent exponents. A similar model defined on a lattice is introduced and solved. Various generalizations, e.g. to the case of internal symmetries of the fermions, are discussed. The present treatment also clarifies certain aspects of Luttinger's original solution of the ``Luttinger model''.

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