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arXiv 1503.00430cond-mat.stat-mech
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网络上伊辛模型的冻结态和主动吸收相变

Frozen states and active-absorbing phase transitions of the Ising model on networks

Abdul Khaleque, Parongama Sen

摘要:

已知伊辛模型的零温淬火导致随机和小世界网络的冻结稳态。我们研究了随机无标度网络(RSF)上的猝灭现象,并将其与Barabási-Albert网络(BA)和Watts Strogatz(WS)添加型网络进行了比较。虽然在所有情况下都存在冻结状态,但RSF显示出与WS模型一样的平均场性质的有序-无序相变,以及由活性相分离的两个吸收相的存在。WS网络还显示了在已知的有序-无序转变点处发生的活性吸收(A-A)相变。RSF和BA网络结果的比较显示了有限尺寸依赖性的有趣差异。

英文摘要:

A zero temperature quench of the Ising model is known to lead to a frozen steady state on random and small world networks. We study such quenches on random scale free networks (RSF) and compare the scenario with that in the Barabási-Albert network (BA) and the Watts Strogatz (WS) addition type network. While frozen states are present in all the cases, the RSF shows an order-disorder phase transition of mean field nature as in the WS model as well as the existence of two absorbing phases separated by an active phase. The WS network also shows an active-absorbing (A-A) phase transition occurring at the known order-disorder transition point. The comparison of the RSF and the BA network results show interesting difference in finite size dependence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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