Existence of long-range order in the steady state of a two-dimensional, two-temperature XY model.
Existence of long-range order in the steady state of a two-dimensional, two-temperature XY model.
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二维、两温度 XY 模型稳态下存在长程有序。
DOI：
10.1103/physreve.52.r9
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Rácz
中科院分区：
文献类型：
--
作者：
Bassler;Rácz
蒙特卡罗模拟表明，d=2，两温度，扩散的XY模型的稳态呈现出从均匀无序相到长程有序相的连续相变。尽管动力学和相互作用都是局域的，但长程有序是存在的，这表明Mermin-Wagner定理对非平衡稳态的天真推广是失败的。认为这种有序是由于非平衡动力学产生的有效偶极相互作用所致。
Monte Carlo simulations are used to show that the steady state of the d=2, two-temperature, diffusive XY model displays a continuous phase transition from a homogeneous disordered phase to a phase with long-range order. The long-range order exists although both the dynamics and the interactions are local, thus indicating the failure of a naive extension of the Mermin-Wagner theorem to nonequilibrium steady states. It is argued that the ordering is due to effective dipole interactions generated by the nonequilibrium dynamics.