Zero temperature solutions of the Edwards-Anderson model in random Husimi lattices

A Lage-Castellanos, R Mulet - The European Physical Journal B, 2008 - Springer
The European Physical Journal B, 2008Springer
Abstract We solve the Edwards-Anderson model (EA) in different Husimi lattices using the
cavity method at replica symmetric (RS) and 1-step of replica symmetry breaking (1RSB)
levels. We show that, at T= 0, the structure of the solution space depends on the parity of the
loop sizes. Husimi lattices with odd loop sizes may have a trivial paramagnetic solution
thermodynamically relevant for highly frustrated systems while, in Husimi lattices with even
loop sizes, this solution is absent. The range of stability under 1RSB perturbations of this …
Abstract
We solve the Edwards-Anderson model (EA) in different Husimi lattices using the cavity method at replica symmetric (RS) and 1-step of replica symmetry breaking (1RSB) levels. We show that, at T = 0, the structure of the solution space depends on the parity of the loop sizes. Husimi lattices with odd loop sizes may have a trivial paramagnetic solution thermodynamically relevant for highly frustrated systems while, in Husimi lattices with even loop sizes, this solution is absent. The range of stability under 1RSB perturbations of this and other RS solutions is computed analytically (when possible) or numerically. We also study the transition from 1RSB solutions to paramagnetic and ferromagnetic RS solutions. Finally we compare the solutions of the EA model in Husimi lattices with that on the (short loops free) Bethe lattices, showing that already for loop sizes of order 8 both models behave similarly.
Springer
以上显示的是最相近的搜索结果。 查看全部搜索结果