标题： 横向磁场下双量子点中单个电子的热量子关联 显示英文标题

标题： Thermal quantum correlations of a single electron in a double quantum dot with transverse magnetic field

摘要： 在本文中，我们研究半导体双量子点系统中的热量子关联。该装置包含一个处于双量子点中的单个电子，受到纵向磁场和横向磁场梯度的作用。单个电子的热纠缠由电荷和自旋量子位驱动。利用密度矩阵形式，我们推导出热纠缠度和相关相干性的解析表达式。本工作的主要目标是提供对温度和各种参数对量子相干性影响的良好理解。此外，我们的研究结果表明，横向磁场可以用来调节系统的热纠缠和量子相干性。我们还强调了热纠缠和相关相干性在生成量子关联中的作用，指出热相关相干性始终比热纠缠更稳健。这表明，仅基于相关相干性的量子算法可能比依赖纠缠的算法更具鲁棒性。 显示英文摘要

摘要： In this paper, we investigate the thermal quantum correlations in a semiconductor double quantum dot system. The device comprises a single electron in a double quantum dot subjected to a longitudinal magnetic field and a transverse magnetic field gradient. The thermal entanglement of the single electron is driven by the charge and spin qubits. Utilizing the density matrix formalism, we derive analytical expressions for thermal concurrence and correlated coherence. The main goal of this work is to provide a good understanding of the effects of temperature and various parameters on quantum coherence. Additionally, our findings indicate that the transverse magnetic field can be employed to adjust the thermal entanglement and quantum coherence of the system. We also highlight the roles of thermal entanglement and correlated coherence in generating quantum correlations, noting that thermal correlated coherence is consistently more robust than thermal entanglement. This suggests that quantum algorithms based solely on correlated coherence might be more resilient than those relying on entanglement.