Finite size effects in the XXZ and sine-Gordon models with two boundaries

@inproceedings{Ahn2003FiniteSE,
  title={Finite size effects in the XXZ and sine-Gordon models with two boundaries},
  author={Changrim Ahn and Rafael I. Nepomechie},
  year={2003}
}
We compute the boundary energy and the Casimir energy for both the spin-12 XXZ quantum spin chain and (by means of the light-cone lattice construction) the massive sine-Gordon model with both left and right boundaries. We also derive a nonlinear integral equation for the ground state of the sine-Gordon model on a finite interval. These results, which are… CONTINUE READING