论文标题
通过靠近高阶特殊点来加快纠缠产生
Speeding up entanglement generation by proximity to higher-order exceptional points
论文作者
论文摘要
纠缠是从量子传感到量子计算的量子信息技术的关键资源。通常，在耦合强度的倒数的时间范围内建立了两个耦合量子位之间的纠缠。在这项工作中，我们研究了两个弱耦合的非铁粒粒子，并通过与高阶特殊点的距离观察到纠缠的时间较短。我们建立了基于生物三相完整的基础的非热扰动理论，并进一步确定获得最大纠缠状态的最佳条件。我们在非危险量子系统中加快纠缠产生的研究为利用量子技术的连贯非正式耗散的新途径开辟了新的途径。
Entanglement is a key resource for quantum information technologies ranging from quantum sensing to quantum computing. Conventionally, the entanglement between two coupled qubits is established at the time scale of the inverse of the coupling strength. In this work, we study two weakly coupled non-Hermitian qubits and observe entanglement generation at a significantly shorter time scale by proximity to a higher-order exceptional point. We establish a non-Hermitian perturbation theory based on constructing a biorthogonal complete basis and further identify the optimal condition to obtain the maximally entangled state. Our study of speeding up entanglement generation in non-Hermitian quantum systems opens new avenues for harnessing coherent nonunitary dissipation for quantum technologies.
