Monte Carlo studies of the quantum XY model in two dimensions.
Monte Carlo studies of the quantum XY model in two dimensions.
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二维量子 XY 模型的蒙特卡罗研究。
DOI：
10.1103/physrevb.31.4712
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Grant Pm
中科院分区：
文献类型：
--
作者：
E. Loh;D. Scalapino;Grant Pm
Monte Carlo模拟的自旋-\textone half {} $\mathrm{XY}$模型在二维大（高达24\ifmmode\times\else\texttimes\fi{}24网站）晶格。在宽的温度范围内得到的结果，其中包括临界温度${T}_{c}$，估计为0.4-0.5。给出了能量、比热、涡旋密度和螺旋度模量的导数随温度的变化关系。随着晶格尺寸的增加，每个自旋的比热接近一个有限的值，并不发散。
Monte Carlo simulations are performed for the spin-\textonehalf{} $\mathrm{XY}$ model in two dimensions for large (up to 24\ifmmode\times\else\texttimes\fi{}24 sites) lattices. Results are obtained over a wide temperature range which includes the critical temperature ${T}_{c}$, estimated to be 0.4-0.5. The energy, specific heat, vortex density, and derivative of the helicity modulus are given as functions of temperature. As the lattice size is increased, the specific heat per spin approaches a finite value and does not diverge.