论文标题
光子芯片上环量子重力的实验模拟
Experimental Simulation of Loop Quantum Gravity on a Photonic Chip
论文作者
论文摘要
一般相对论和量子理论的统一是现代物理学的迷人问题之一。一种领先的解决方案是环量子重力（LQG）。模拟LQG对于提供可以通过实验测试的预测可能很重要。但是，这种复杂的量子模拟不能在古典计算机上有效运行，并且需要量子计算机或模拟器。在这里，我们在实验上证明了在集成光子量子处理器上LQG的自旋振幅的量子模拟。我们模拟了LQG的基本过渡，并表明，尽管实验性不完美，但相对于理论预测，衍生的Spinfoam顶点振幅在4％的误差范围内。我们还讨论了如何在现实的实验条件下概括更复杂的过渡的模拟，这最终将导致量子优势演示以及扩展工具箱以研究LQG。
The unification of general relativity and quantum theory is one of the fascinating problems of modern physics. One leading solution is Loop Quantum Gravity (LQG). Simulating LQG may be important for providing predictions which can then be tested experimentally. However, such complex quantum simulations cannot run efficiently on classical computers, and quantum computers or simulators are needed. Here, we experimentally demonstrate quantum simulations of spinfoam amplitudes of LQG on an integrated photonics quantum processor. We simulate a basic transition of LQG and show that the derived spinfoam vertex amplitude falls within 4% error with respect to the theoretical prediction, despite experimental imperfections. We also discuss how to generalize the simulation for more complex transitions, in realistic experimental conditions, which will eventually lead to a quantum advantage demonstration as well as expand the toolbox to investigate LQG.
