Exact solution of a Yang-Baxter spin-1/2 chain model and quantum entanglement
Exact solution of a Yang-Baxter spin-1/2 chain model and quantum entanglement
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DOI：
10.1103/physreva.78.052324
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发表时间：
2008-07
影响因子：
2.9
通讯作者：
Ming-Guang Hu;K. Xue;M. Ge
中科院分区：
文献类型：
--
作者：
Ming-Guang Hu;K. Xue;M. Ge
纠缠被认为在宏观物理系统中对于理解量子相变等集体量子现象至关重要。我们从具有非均匀和各向异性短程相互作用的 Yang-Baxter spin-$1∕2$ 链模型开始并精确求解。对于基态，我们展示了参数空间中相邻纠缠的行为，并发现非均匀耦合强度以与均匀情况不同的方式影响纠缠，但这不会影响纠缠和量子临界性之间的一致性。
Entanglement is believed to be crucial in macroscopic physical systems for understanding the collective quantum phenomena such as quantum phase transitions. We start from and solve exactly a Yang-Baxter spin-$1∕2$ chain model with inhomogeneous and anisotropic short-range interactions. For the ground state, we show the behavior of neighboring entanglement in the parameter space and find that the inhomogeneous coupling strengths affect entanglement in a distinctive way from the homogeneous case, but this would not affect the coincidence between entanglement and quantum criticality.