Unified Approach to Thermodynamic Bethe Ansatz and Finite Size Corrections for Lattice Models and Field

@inproceedings{Vega1995UnifiedAT,
  title={Unified Approach to Thermodynamic Bethe Ansatz and Finite Size Corrections for Lattice Models and Field},
  author={H{\'e}ctor J. de Vega},
  year={1995}
}
We present a unified approach to the Thermodynamic Bethe Ansatz (TBA) for magnetic chains and field theories that includes the finite size (and zero temperature) calculations for lattice BA models. In all cases, the free energy follows by quadratures from the solution of a single non-linear integral equation (NLIE). [A system of NLIE appears for nested BA]. We derive the NLIE for: a) the six-vertex model with twisted boundary conditions ; b) the XXZ chain in an external magnetic field h z and c… CONTINUE READING
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