搜索

x
中国物理学会期刊

应用多尺度纠缠重整化算法研究量子自旋系统的量子相变和基态纠缠

CSTR: 32037.14.aps.61.210502

Quantum phase transition and ground state entanglement of the quantum spin system: a MERA study

CSTR: 32037.14.aps.61.210502
PDF
导出引用
  • 应用多尺度纠缠重整化算法模拟自旋为1/2的一维量子XYX 模型, 通过计算局域序参量和度量纠缠的单缠节(one-tangle)、 并发纠缠(concurrence)和纠缠比率R, 确定系统的基态相图和纠缠相图. 发现系统的纠缠相图比基态相图包含更多的物理信息. 另外, 从局域序参量和能隙与外磁场的标度关系, 萃取出与磁化率和关联长度有关的临界指数β 和ν.

     

    We use the multi-scale entanglement reorganization ansatz algorithm to simulate the spin 1/2 quantum XYX model and determine its ground-state phase diagram and entanglement phase diagram by using local order parameter and characterizing quantum entanglement: one-tangle, concurrence, and entanglement ratio R. We find that the information in entanglement phase diagram is more than in ground-state phase diagram. In addition, we extract the critical exponents β and ν from the numerical data near critical point.

     

    目录

    /

    返回文章
    返回