标题： 多量子比特态在相关噪声信道中的量子相干性 显示英文标题

标题： Quantum coherence of multiqubit states in correlated noisy channels

摘要： 长时间维持量子相干性对于其实际应用至关重要。 我们研究了多量子比特系统通过相关信道（相位翻转、比特翻转、比特相位翻转和去极化）时的退相干过程。 结果表明，当信道对量子比特序列的连续作用具有一些经典关联时，相干性的衰减明显被延迟。 特别是，具有大量量子比特的系统的相对熵相干性比具有少量量子比特的系统更稳健。 我们还通过探索非定域量子相干性的变化与多量子比特系统的总相关性增益之间的相互作用，对延迟退相干现象进行了解释。 显示英文摘要

摘要： The long-time maintenance of quantum coherence is crucial for its practical applications. We explore decoherence process of a multiqubit system passing through a correlated channel (phase flip, bit flip, bit-phase flip, and depolarizing). The results show that the decay of coherence was evidently delayed when the consecutive actions of the channel on the sequence of qubits has some classical correlations. In particular, the relative entropy of coherence for a system with large number of qubits is more robust than that with small number of qubits. We also provide an explanation for the delayed decoherence by exploring the interplay between the change of the unlocalized quantum coherence and the total correlation gain of the multiqubit system.