Steered Quantum Coherence and Quantum Criticality in the XY Model with Dzyaloshinsky–Moriya Interaction,Physica Status Solidi (B) - Basic Solid State Physics

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Steered Quantum Coherence and Quantum Criticality in the XY Model with Dzyaloshinsky–Moriya Interaction
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-11-28 , DOI: 10.1002/pssb.202000322
Yu-Xia Xie ₁

Affiliation

The critical behaviors of the steered quantum coherence (SQC) in the transverse field XY model with Dzyaloshinsky–Moriya (DM) interaction are explored. It is found that there is an inflexion for the SQC at the critical field of quantum phase transition (QPT) for two long‐distance spins, and there is a divergence for the derivative of the SQC with respect to the magnetic field at the critical field of QPT for any two spins in the chain. Moreover, SQC shows distinct behaviors in different phase regions of the model, which is also a signature of the QPT. Furthermore, the SQC method is robust in studying quantum criticality even under environmental coupling.

中文翻译：

具有Dzyaloshinsky-Moriya相互作用的XY模型中的定向量子相干性和量子临界性

探索了在具有Dzyaloshinsky-Moriya（DM）相互作用的横向场XY模型中，转向量子相干（SQC）的临界行为。发现在两次长距离自旋的量子相变（QPT）临界场上，SQC有一个拐点，并且在临界场上，SQC的导数相对于磁场有偏差链中任何两个旋转的QPT的值。此外，SQC在模型的不同相位区域显示出不同的行为，这也是QPT的特征。此外，即使在环境耦合下，SQC方法在研究量子临界性方面也很鲁棒。

更新日期：2020-11-28

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