arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.01554cond-mat.str-elcond-mat.stat-mech
收藏

量子反铁磁海森堡系统纠缠熵标度的改进

Improved scaling of the entanglement entropy of quantum antiferromagnetic Heisenberg systems

Zehui Deng, Lu Liu, Wenan Guo, H. Q. Lin

AI总结:

本文通过修正纠缠熵次主导对数项,利用量子蒙特卡洛模拟改进标度公式,在小尺寸系统中更准确估计戈德斯通模数目,并验证了普适有限常数。

摘要:

本文推导了具有自发破缺连续对称性系统中纠缠熵次主导对数项的修正。利用量子蒙特卡洛模拟,我们表明,与先前结果相比,改进的标度公式能在相当小的系统中,对二维正方晶格自旋-1/2海森堡模型和双层自旋-1/2海森堡模型中的戈德斯通模数目给出更好的估计。此外,纠缠熵标度中依赖于几何形状的普适有限常数也获得了与理论值良好一致的结果。

英文摘要:

In this paper, we derive corrections to the subleading logarithmic term of the entanglement entropy in systems with spontaneous broken continuous symmetry. Using quantum Monte Carlo simulations, we show that the improved scaling formula leads to much better estimations of the number of Goldstone modes in the two-dimensional square lattice spin-1/2 Heisenberg model and bilayer spin-1/2 Heisenberg model in systems of rather small sizes, compared with previous results. In addition, the universal geometry-dependent finite constant in the entanglement entropy scaling is also obtained in good agreement with the theoretical value.

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。

↑