Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro, 5, I-00185 Roma, Italy.
Phys Rev Lett. 2012 Jan 6;108(1):010502. doi: 10.1103/PhysRevLett.108.010502. Epub 2012 Jan 5.
Quantum walk represents one of the most promising resources for the simulation of physical quantum systems, and has also emerged as an alternative to the standard circuit model for quantum computing. Here we investigate how the particle statistics, either bosonic or fermionic, influences a two-particle discrete quantum walk. Such an experiment has been realized by exploiting polarization entanglement to simulate the bunching-antibunching feature of noninteracting bosons and fermions. To this scope a novel three-dimensional geometry for the waveguide circuit is introduced, which allows accurate polarization independent behavior, maintaining remarkable control on both phase and balancement.
量子行走是模拟物理量子系统最有前途的资源之一，它也已经成为量子计算标准电路模型的一种替代方案。在这里，我们研究了粒子统计（玻色子或费米子）如何影响两粒子离散量子行走。通过利用偏振纠缠来模拟非相互作用玻色子和费米子的聚束-反聚束特征，已经实现了这样的实验。为此，引入了一种新颖的波导电路三维几何结构，它允许精确的偏振无关行为，对相位和平衡都有显著的控制。
