论文标题
反事实通用量子计算
Counterfactual universal quantum computation
论文作者
论文摘要
通用量子计算通常与两级量子子系统之间的相互作用有关，因为这种相互作用通常被视为实现通用量子计算的必要性。在这项工作中，我们表明，与这种直觉相反，可以在最初独立的两级量子子系统之间进行相互作用而实现通用量子计算。我们称其为反事实通用量子计算。作为特殊情况，我们展示了如何实现量子状态，反事实量子交换和反事实量子擦除代码的反事实通信。为了简化实际的实现，我们用现实的设备分析了反事实通用量子计算，包括有限执行时间，光子损失和缺失原子的影响。除了说明量子物理学的神秘和违反直觉的理论兴趣外，我们的作品还采用了对古代艺术成像的彩色成像的实用，因此禁止光线发光。
Universal quantum computation is usually associated with interaction among two-level quantum subsystems, as this interaction is commonly viewed as a necessity to achieve universal quantum computation. In this work, we show that, contrary to this intuition, universal quantum computation can be achieved without interaction among initially independent two-level quantum subsystems. We call it counterfactual universal quantum computation. As special cases, we show how to achieve counterfactual communication of quantum states, counterfactual quantum swapping, and counterfactual quantum erasure codes. To ease practical implementation, we analyze counterfactual universal quantum computation with realistic devices, including the effects of finite execution time, photon loss, and atom missing. Besides the theoretical interest of illustrating the mysterious and counterintuitive nature of quantum physics, our work has practical applications to color imaging of ancient arts, upon which light is forbidden to shine.
