arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.09421quant-phphysics.optics
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二能级与四能级量子系统之间的量子信息转移

Quantum Information Transfer between a Two-Level and a Four-Level Quantum System

Tianfeng Feng, Qiao Xu, Linxiang Zhou, Maolin Luo, Wuhong Zhang, Xiaoqi Zhou

AI总结:

本文理论与实验验证了一种利用光学 qubit-ququart 纠缠门在不同维度量子客体间转移量子信息的方案,保真度达 0.700-0.917,突破了同维限制并展示了超越二能级系统的纠缠操作能力。

摘要:

量子力学提供了一种非实体的方式,将量子信息从一个量子客体转移到另一个量子客体。理论上,这种量子信息转移可以发生在任意维度的量子客体之间,然而迄今为止所报道的量子信息转移实验主要集中在量子客体具有相同维度的情况。在此,我们在理论上提出并在实验上验证了一种在不同维度量子客体之间进行量子信息转移的方案。通过使用光学 qubit-ququart 纠缠门,我们观察到了两个不同维度光子之间的量子信息转移,包括量子信息从四维光子流向二维光子,以及反之亦然。量子信息转移的保真度范围为 0.700 到 0.917,均高于 2/3 的经典极限。我们的工作为量子信息转移指明了新方向,并证明了我们实现超越二能级量子系统纠缠操作的能力。

英文摘要:

Quantum mechanics provides a disembodied way to transfer quantum information from one quantum object to another. In theory, this quantum information transfer can occur between quantum objects of any dimension, yet the reported experiments of quantum information transfer to date have mainly focused on the cases where the quantum objects have the same dimension. Here we theoretically propose and experimentally demonstrate a scheme for quantum information transfer between quantum objects of different dimensions.By using an optical qubit-ququart entangling gate, we observe the transfer of quantum information between two photons with different dimensions, including the flow of quantum information from a four-dimensional photon to a two-dimensional photon and vice versa.The fidelities of the quantum information transfer range from 0.700 to 0.917, all above the classical limit of 2/3. Our work sheds light on a new direction for quantum information transfer and demonstrates our ability to implement entangling operations beyond two-level quantum systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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