Abstract:
We introduce the notion of a weakly periodic configuration. For the Ising model with competing interactions, we describe the set of all weakly periodic ground states corresponding to normal divisors of indices $2$ and
$4$ of the group representation of the Cayley tree. In addition, we study new Gibbs measures for the Ising model.
Citation:
U. A. Rozikov, M. M. Rakhmatullaev, “Weakly periodic ground states and Gibbs measures for the Ising model with competing interactions on the Cayley tree”, TMF, 160:3 (2009), 507–516; Theoret. and Math. Phys., 160:3 (2009), 1292–1300