基于CC和QJSD测度的自旋链系统量子相变研究

Quantum phase transition is an important research content in quantum information and condensed matter physics, which is one of the hot research topics in physics. At present, quantum entanglement and quantum discord are mainly used to study the quantum phase transitions of spin chain systems in the world. In order to deepen the study of spin chain systems and reveal new physical phenomena and laws, it is necessary to study quantum phase transitions with different quantum coherence measures. In this project, quantum coherence measures, Correlated Coherence (CC) and Quantum Jensen-Shannon Divergence (QJSD), proposed by the international community are used to study the conditions for quantum phase transitions in several different spin chain systems. The effects of magnetic field, temperature, and anisotropic strength on quantum phase transitions are studied. CC and QJSD coherence measures are compared with quantum entanglement and quantum discord to develop and improve CC and QJSD measures. This project is helpful to deepen the understanding of quantum phase transitions of spin chain systems, build a bridge between quantum information and condensed state physics, develop new quantum coherence measures, and expand the applications of quantum coherence resources in the field of quantum technology. The research results have important scientific significance and academic value both in theory and experiment.

量子相变是量子信息学和凝聚态物理的重要研究内容，是物理学的热门研究课题之一。目前国际上主要利用量子纠缠、量子失协对自旋链系统量子相变进行研究。为了加深对自旋链系统的研究以及揭示新的物理现象和规律，采用不同的量子相干性测度研究量子相变非常必要。本项目采用国际上提出的量子相干性测度CorrelatedCoherence(CC)和QuantumJensen-ShannonDivergence(QJSD)，研究几类不同自旋链系统量子相变发生的条件；研究磁场、温度和各向异性强度对发生量子相变的影响；将CC和QJSD二种相干性测度与量子纠缠、量子失协等进行比较，以发展和完善CC和QJSD测度。本项目有助于加深对自旋链系统量子相变的理解，建立量子信息与凝聚态物理相连接的桥梁，开发新的量子相干性测度，以及拓展量子相干资源在量子技术领域的应用。研究结果在理论和实验上具有重要科学意义和学术价值。

量子相变是量子信息学和凝聚态物理的重要研究内容，是物理学的热门研究课题之一。量子测度对不同物理系统的研究具有重要意义，利用不同量子测度能够有效地刻画量子相变。目前量子测度主要利用量子纠缠、量子失协等对自旋链系统量子相变进行研究。为了加深对自旋链系统的研究以及揭示新的物理现象和规律，采用不同的新的量子相干性测度研究量子相变非常必要。本项目采用不同量子相干性测度，研究几类不同自旋链系统量子相变发生的条件以及研究磁场、温度和各向异性强度对发生量子相变的影响，并将不同相干性测度与量子纠缠、量子失协刻画量子相变进行比较。同时我们还研究了多体量子系统的量子失协，量子纠缠作为信道在量子操作共享中的应用以及如何通过光机械系统产生纠缠。研究结果在理论和实验上具有重要科学意义和学术价值。项目研究达到预期目标，取得了一系列成果，发表学术论文8篇，其中Physica E一篇、Physical Review A一篇。