标题： 量子关联在量子能量传递中的鲁棒性 显示英文标题

标题： Robustness of quantum correlation in quantum energy teleportation

摘要： 我们使用量子失谐而不是传统使用的纠缠熵来展示量子能量隐形传态（QET）协议中量子关联的演化。 在QET协议中，由于混合态的统计性产生，局部观测和条件操作的重复会使量子关联变得非平凡。 在本文中，我们使用量子失谐作为混合态中量子关联的度量，并研究其与传输能量和相变的关系。 在爱丽丝和鲍勃执行QET的过程中，人们会预期爱丽丝对量子态的测量会完全破坏爱丽丝和鲍勃之间的纠缠，因此量子关联会消失。 然而，与这种预期相反，使用量子失谐显示，在整个QET过程中量子关联并未消失。 为了演示在不同相结构下QET中量子关联的鲁棒性，我们使用几个基准模型进行数值分析，包括具有手征化学势和化学势的Nambu-Jona-Lasino（NJL）模型，这些模型有助于研究模拟左右夸克之间手征不平衡的相结构，这些结构与手征密度算符耦合。 在我们研究的所有情况下，量子失谐都表现出相变的序参量行为。 显示英文摘要

摘要： We present the evolution of quantum correlation in the quantum energy teleportation (QET) protocol using quantum discord, instead of the traditionally used entanglement entropy. In the QET protocol, where local observations and conditional operations are repeated, quantum correlations become nontrivial because of the statistical creation of mixed states. In this paper, we use quantum discord as a measure of quantum correlation in mixed states and investigate its relationship to teleported energy and phase transitions. During the process of Alice and Bob performing QET, one would expect that the entanglement between Alice and Bob is completely broken by Alice's measurement of the quantum state, and thus the quantum correlation disappears. However, contrary to this expectation, it is shown using quantum discord that the quantum correlation does not disappear during the entire process of QET. To demonstrate the robustness of the quantum correlation in QET at various phase structures, we perform the numerical analysis using several benchmark models including the Nambu-Jona-Lasino (NJL) model with both the chiral chemical potential and the chemical potential, which are useful to study the phase structures mimicking the chiral imbalance between left- and right- quarks coupled to the chirality density operator. In all cases we studied, the quantum discord behaved as an order parameter of the phase transition.