发表机构
School of Economics and Management, Wuyi University（五邑大学经济管理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究四量子比特簇态寄存器中加速探测器对的可恢复纠缠，通过局域制备相位控制噪声保护，在最优相位下固定解码器恢复贝尔对，并推导小间距衰减速率及热浴匹配下的最优时间，最终恢复隐形传态资源。
AI 中文摘要
我们研究了四量子比特簇态寄存器中的可恢复纠缠，其中两个探测器量子比特与标量场耦合。局域制备相位保持初始参考-寄存器纠缠和探测器边缘不变，但控制集体噪声下的保护。在最优相位下，固定解码器可在任何保持单重态和三重态扇区的信道后恢复贝尔对。对于有限间距的均匀加速探测器，精确的迹范数公式表明，在弱耦合的长期动力学中，同一相位在每个时刻都是最优的。小间距产生缓慢衰减，我们推导了其速率和相位依赖的振幅。将局域响应与惯性热浴匹配，给出了纠缠对比度的解析最优时间。探测器测量和条件相位校正恢复两量子比特隐形传态资源。空间涂抹和有序的弱耦合随后的小间距极限明确了寿命预测的微观范围。
英文摘要
We study recoverable entanglement in a four-qubit cluster-state register whose two detector qubits couple to a scalar field. A local preparation phase leaves the initial reference--register entanglement and detector marginal unchanged, but controls protection under collective noise. At the optimal phase, a fixed decoder recovers a Bell pair after any channel preserving the singlet and triplet sectors. For uniformly accelerated detectors at finite separation, an exact trace-norm formula shows that the same phase is optimal at every time within the secular weak-coupling dynamics. Small separation produces a slow decay, whose rate and phase-dependent amplitude we derive. Matching the local response to an inertial thermal bath gives an analytic optimum time for the entanglement contrast. A detector measurement and conditional phase correction recover a two-qubit teleportation resource. Spatial smearing and an ordered weak-coupling then small-separation limit specify the microscopic scope of the lifetime prediction.
