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.
|Journal||Journal of Statistical Mechanics: Theory and Experiment|
|Publication status||Published - 1 Feb 2008|
- Correlation functions
- Integrable spin chains (vertex models)
- Quantum integrability (Bethe ansatz)
- Solvable lattice models