论文标题
转导的量子相干性作为自旋链中量子相变的特征
Steered quantum coherence as a signature of quantum phase transitions in spin chains
论文作者
论文摘要
我们建议将转向的量子相干性（SQC）作为量子相变（QPTS）的签名。通过考虑各种自旋链模型，包括\ textIt {xy}模型和具有三旋转相互作用的\ textIt {xx}模型，我们表明SQC及其第一阶导数成功地信号QPT的不同关键点发出了信号。特别是，SQC方法对于从链条中选择的任何自旋对有效，与纠缠和量子不和谐相反，SQC的强度对经过测试的旋转的距离不敏感（前提是它不是很短），这使得它可以方便地使用，因为在链中不需要在链中进行两次启动。
We propose to use the steered quantum coherence (SQC) as a signature of quantum phase transitions (QPTs). By considering various spin chain models, including the transverse-field Ising model, \textit{XY} model, and \textit{XX} model with three-spin interaction, we showed that the SQC and its first-order derivative succeed in signaling different critical points of QPTs. In particular, the SQC method is effective for any spin pair chosen from the chain, and the strength of SQC, in contrast to entanglement and quantum discord, is insensitive to the distance (provided it is not very short) of the tested spins, which makes it convenient for practical use as there is no need for careful choice of two spins in the chain.
