Persistence in an antiferromagnetic Ising model with conserved magnetisation

Details Persistence in an antiferromagnetic Ising model with conserved magnetisation Persistence in an antiferromagnetic Ising model with conserved magnetisation

2002-06-07

arxiv.org/abs/cond-mat/0206112v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, to be published in Physica A (Proceedings of the Statphys-Kolkata IV, 2002)

Scientific paper

10.1016/S0378-4371(02)01423-1

We obtain the persistence exponents for an antiferromagnetic Ising system in which the magnetisation is kept constant. This system belongs to Model C (system with non-conserved order parameter with a conserved density) and is expected to have persistence exponents different from that of Model A (system with no conservation) but independent of the conserved density. Our numerical results for both local persistence at zero temperature and global persistence at the critical temperature however indicate that the exponents are dependent on the conserved magnetisation in both two and three dimensions. This nonuniversal feature is attributed to the presence of the conserved field and is special to the persistence phenomena.

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