Quantum Spins and Random Loops on the Complete Graph

Quantum Spins and Random Loops on the Complete Graph
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完整图上的量子自旋和随机循环

DOI:
10.1007/s00220-019-03634-x
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发表时间:
2018
影响因子:
2.4
通讯作者:
D. Ueltschi
D. Ueltschi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jakob E. Björnberg;J. Fröhlich;D. Ueltschi

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我们提出了一个系统的分析,量子海森堡-,XY-和交换模型的完全图。这些模型表现出相变伴随着自发对称性破缺,我们研究通过计算的平均自旋密度的功率的期望的生成函数。确定了各种临界指数。相关的循环模型的某些对象被证明具有泊松-狄利克雷分布的属性。
We present a systematic analysis of quantum Heisenberg-, xy- and interchange models on the complete graph. These models exhibit phase transitions accompanied by spontaneous symmetry breaking, which we study by calculating the generating function of expectations of powers of the averaged spin density. Various critical exponents are determined. Certain objects of the associated loop models are shown to have properties of Poisson–Dirichlet distributions.
DOI: 10.48550/arxiv.1104.0983
发表时间: 2011
期刊: arXiv e-prints
影响因子: --
作者:
Goldschmidt Christina
通讯作者: Goldschmidt Christina