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arXiv 1601.04772cond-mat.stat-mech
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有序相双层Heisenberg模型的普适标度Higgs-质量能隙

Universal scaled Higgs-mass gap for the bilayer Heisenberg model in the ordered phase

Yoshihiro Nishiyama

摘要:

用数值对角化方法研究了双层量子海森堡模型的光谱性质。在有序相中,出现了嵌入在Goldstone激发连续谱中的大质量Higgs激发。最近,有人声称,适当比例的希格斯质量是一个接近临界点的普适常数。对角化有限大小的集团与$N \le 36$自旋,我们计算的动态标量磁化率$χ_s"(ω)$,这是相当不敏感的Goldstone模式。对$χ_s "(ω)$进行了有限尺度分析,并估算了普适的(适当尺度的)希格斯质量。

英文摘要:

The spectral properties for the bilayer quantum Heisenberg model were investigated with the numerical diagonalization method. In the ordered phase, there appears the massive Higgs excitation embedded in the continuum of the Goldstone excitations. Recently, it was claimed that the properly scaled Higgs mass is a universal constant in proximity to the critical point. Diagonalizing the finite-size cluster with $N \le 36$ spins, we calculated the dynamical scalar susceptibility $χ_s"(ω)$, which is rather insensitive to the Goldstone mode. A finite-size-scaling analysis of $χ_s "(ω)$ is made, and the universal (properly scaled) Higgs mass is estimated.

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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