论文标题
量子转向作为量子争夺的见证
Quantum steering as a witness of quantum scrambling
论文作者
论文摘要
量子信息争夺描述了在所有可能的自由度中，以纠缠形式将本地信息定位到全球信息。三方共同信息（TMI）的自然衡量标准是量化给定量子通道的DEREACALICE信息的量，其状态表示，即Choi状态。在这项工作中，我们表明，量子信息也可以通过量子系统的量子转向来见证。我们之所以这样做，是因为Choi状态与时间量子相关性中使用的伪密度矩阵形式主义之间存在基本等效性。特别是，我们根据一种称为“暂时的可伸缩权重”的时间转向的量度，提出了一个数量作为争夺证人。我们通过证明该数量在频道不散布时就会消失，以证明统一Qubit频道的争夺见证人是合理的。
Quantum information scrambling describes the delocalization of local information to global information in the form of entanglement throughout all possible degrees of freedom. A natural measure of scrambling is the tripartite mutual information (TMI), which quantifies the amount of delocalized information for a given quantum channel with its state representation, i.e., the Choi state. In this work, we show that quantum information scrambling can also be witnessed by temporal quantum steering for qubit systems. We can do so because there is a fundamental equivalence between the Choi state and the pseudo-density matrix formalism used in temporal quantum correlations. In particular, we propose a quantity as a scrambling witness, based on a measure of temporal steering called temporal steerable weight. We justify the scrambling witness for unitary qubit channels by proving that the quantity vanishes whenever the channel is non-scrambling.
