Artigo
Field-induced nonmagnetic impurities interaction in the quantum ising chain
Autor
Silva, Ricardo L.
Guimaraes, Paulo R. C.
Pereira, Afranio R.
Institución
Resumen
We study static vacancies on a ferromagnetic spin-1/2 chain described by the transverse Ising model with second neighbor interactions at zero temperature. Using exact diagonalization techniques and applying a finite-size scaling approach, it is found that a strong magnetic field induces an effective potential of interaction between two vacancies that is attractive.