论文标题
量子系统的动态状态重建受纯净的校正
Dynamic state reconstruction of quantum systems subject to pure decoherence
论文作者
论文摘要
本文介绍了有效的量子状态层析成像方案，用于Qutrits和纠缠的Qubits，受到纯净的腐蚀。我们为通过相阻尼渠道发送的开放系统实施动态状态重建方法，该系统提出：开放系统。 inf。 dyn。 23，1650019（2016）。在当前文章中，我们证明，在四个不同时刻测量的两个不同的可观察物可以用相位阻尼通道给出的演变来重建QUTRIT的初始密度矩阵。此外，我们概括了该方法，以确定纠缠量子位量子断层扫描的最佳标准。最后，我们证明了两个通用定理，这些定理是关于Qudits量子断层扫描所需的不同可观察物数量的最小数量。我们认为，动态状态重建方案为量子断层扫描带来了显着的进步和新颖性，因为它们允许减少解决问题所需的不同测量值的数量，从实验的角度来看，这很重要。
The article introduces efficient quantum state tomography schemes for qutrits and entangled qubits subject to pure decoherence. We implement the dynamic state reconstruction method for open systems sent through phase-damping channels which was proposed in: Open Syst. Inf. Dyn. 23, 1650019 (2016). In the current article we prove that two distinct observables measured at four different time instants suffice to reconstruct the initial density matrix of a qutrit with evolution given by a phase-damping channel. Furthermore, we generalize the approach in order to determine the optimal criteria for quantum tomography of entangled qubits. Finally, we prove two universal theorems concerning the minimal number of distinct observables required for quantum tomography of qudits. We believe that dynamic state reconstruction schemes bring significant advancement and novelty to quantum tomography since they allow to reduce the number of distinct measurements required to solve the problem, which is important from the experimental point of view.
