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On the Correction of Anomalous Phase Oscillation in Entanglement Witnesses Using Quantum Neural Networks

机译:用量子神经网络校正纠缠证人中的异常相位振荡

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Entanglement of a quantum system depends upon the relative phase in complicated ways, which no single measurement can reflect. Because of this, “entanglement witnesses” (measures that estimate entanglement) are necessarily limited in applicability and/or utility. We propose here a solution to the problem using quantum neural networks. A quantum system contains the information of its entanglement; thus, if we are clever, we can extract that information efficiently. As proof of concept, we show how this can be done for the case of pure states of a two-qubit system, using an entanglement indicator corrected for the anomalous phase oscillation. Both the entanglement indicator and the phase correction are calculated by the quantum system itself acting as a neural network.
机译:量子系统的纠缠以相对方式取决于相对相位,这是单个测量无法反映的。因此,“纠缠证人”(估计纠缠的措施)的适用性和/或实用性必然受到限制。我们在这里提出使用量子神经网络解决问题的方法。量子系统包含其纠缠信息。因此,如果我们很聪明,我们可以有效地提取该信息。作为概念验证,我们展示了如何使用校正了异常相位振荡的纠缠指示器,在两量子位系统的纯态情况下做到这一点。纠缠指示器和相位校正都是由量子系统本身作为神经网络来计算的。

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