Existence of long-range order in the Migdal recursion equations
Existence of long-range order in the Migdal recursion equations
复制标题
Migdal递推方程中长程序的存在性
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
E. Žalys
中科院分区：
文献类型：
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作者：
P. Bleher;E. Žalys
本文介绍了XY模型的一种改进，使Migdal递推方程是精确的.研究了这些方程的高温和低温不动点。结果严格证明了当维数>2时，该模型在低温下存在长程有序，而在高温下不存在长程有序。
A modification of XY — model is introduced for which Migdal recursion equation are exact. High- and low-temperature fixed points of these equations are investigated. As a result the existence of long-range order at low temperature and its absence at high temperature are proved rigorously for the model under consideration in the case when dimensiond>2.