Kohei Motegi, Kazumitsu Sakai
Published 2007-12-10, updated 2008-02-21Version 2
We formulate correlation functions for a one-dimensional interacting spinless fermion model at finite temperature. By combination of a lattice path integral formulation for thermodynamics with the algebraic Bethe ansatz for fermion systems, the equal-time one-particle Green's function at arbitrary particle density is expressed as a multiple integral form. Our formula reproduces previously known results in the following three limits: the zero-temperature, the infinite-temperature and the free fermion limits.
Comments: 21 pages, v2: typos corrected, published version
Journal: J. Stat. Mech. (2008) P02005
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