Absence of jump discontinuity in the magnetization in quasi-one-dimensional random-field Ising models

Details Absence of jump discontinuity in the magnetization in quasi-one-dimensional random-field Ising models Absence of jump discontinuity in the magnetization in quasi-one-dimensional random-field Ising models

2004-05-17

arxiv.org/abs/cond-mat/0405376v2

Phys. Rev. B 70, 224401 (2004)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 ps figures. Minor corrections

Scientific paper

10.1103/PhysRevB.70.224401

We consider the zero-temperature random-field Ising model in the presence of an external field, on ladders and in one dimension with finite range interactions, for unbounded continuous distributions of random fields, and show that there is no jump discontinuity in the magnetizations for any quasi-one dimensional model. We show that the evolution of the system at an external field can be described by a stochastic matrix and the magnetization can be obtained using the eigenvector of the matrix corresponding to the eigenvalue one, which is continuous and differentiable function of the external field.

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