论文标题
两级和四级量子系统之间的量子信息传输
Quantum Information Transfer between a Two-Level and a Four-Level Quantum System
论文作者
论文摘要
量子力学提供了一种将量子信息从一个量子对象传递到另一个量子对象的无形方法。从理论上讲，这种量子信息传输可以发生在任何维度的量子对象之间，但是报告的量子信息传输到迄今为止的实验主要集中在量子对象具有相同维度的情况下。在这里，我们从理论上提出并在实验上展示了一种方案，用于在不同维度的量子对象之间传递量子信息的方案。通过使用光学Qubit-quarkquart纠缠门，我们观察到两个具有不同维度的光子之间量子信息的传递，包括从四维光子和VIDE的量子转移的量子信息流，包括0.乘量的vice vise versa。 0.917，全部高于2/3的经典限制。我们的工作阐明了量子信息传输的新方向，并证明了我们实施两级量子系统以外的纠缠操作的能力。
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.
