Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.
Science. 2010 Sep 17;329(5998):1500-3. doi: 10.1126/science.1193515.
Quantum walks of correlated particles offer the possibility of studying large-scale quantum interference; simulating biological, chemical, and physical systems; and providing a route to universal quantum computation. We have demonstrated quantum walks of two identical photons in an array of 21 continuously evanescently coupled waveguides in a SiO(x)N(y) chip. We observed quantum correlations, violating a classical limit by 76 standard deviations, and found that the correlations depended critically on the input state of the quantum walk. These results present a powerful approach to achieving quantum walks with correlated particles to encode information in an exponentially larger state space.
关联粒子的量子游走提供了研究大规模量子干涉、模拟生物、化学和物理系统以及提供通用量子计算途径的可能性。我们已经在 SiO(x)N(y) 芯片中的 21 个连续渐逝耦合波导阵列中演示了两个相同光子的量子游走。我们观察到量子关联，违反了经典极限 76 个标准差，并发现关联与量子游走的输入状态密切相关。这些结果提供了一种强大的方法来实现具有关联粒子的量子游走，以在指数级更大的状态空间中编码信息。
