论文标题
具有轨道角动量的有效高维量子门的实验证明
Experimental Demonstration of Efficient High-dimensional Quantum Gates with Orbital Angular Momentum
论文作者
论文摘要
量子门对于实现量子计算机至关重要，并且已经在各种类型的两级系统中实现。但是，很少在理论上和实验上对高维量子门进行研究，即使高维量子系统对于某些量子信息和量子计算任务都具有显着的优势。在这里，我们通过实验证明了四维X门及其独特的更高阶，平均转化效率为93 \％。所有这些大门均基于单光子的轨道 - 角摩肌的自由度。此外，通过使用极化程度的自由度来实现一组受控的量子门。我们的工作是朝着实现任意高维量子电路的目标迈出的重要一步，并为实施高维量子通信和计算铺平了一种方式。
Quantum gates are essential for the realization of quantum computer and have been implemented in various types of two-level systems. However, high-dimensional quantum gates are rarely investigated both theoretically and experimentally even that high-dimensional quantum systems exhibit remarkable advantages over two-level systems for some quantum information and quantum computing tasks. Here we experimentally demonstrate the four-dimensional X gate and its unique higher orders with the average conversion efficiency 93\%. All these gates are based on orbital-angular-momentum degree of freedom of single photons. Besides, a set of controlled quantum gates is implemented by use of polarization degree of freedom. Our work is an important step towards the goal of achieving arbitrary high-dimensional quantum circuit and paves a way for the implementation of high-dimensional quantum communication and computation.
