论文标题
在光子量子行走中由合成场引起的Bloch-Landau-Zener动力学
Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic quantum walk
论文作者
论文摘要
量子步行是在相干系统中模拟动力学的过程。他们的实验实现证明了在Floquet拓扑绝缘子中揭示新现象的关键。在这里，我们意识到在存在合成规场的情况下进行光子量子行走，该量规场模拟了电场对带电粒子的作用。通过调整两个准能带之间的能量差距，我们研究了以Bloch振荡与Landau-Zener跃迁之间相互作用为特征的有趣的系统动力学。当准能量值0和$π$的两个差距都很小时，Floquet Dynamics遵循弹道传播。
Quantum walks are processes that model dynamics in coherent systems. Their experimental implementations proved key to unveil novel phenomena in Floquet topological insulators. Here we realize a photonic quantum walk in the presence of a synthetic gauge field, which mimics the action of an electric field on a charged particle. By tuning the energy gaps between the two quasi-energy bands, we investigate intriguing system dynamics characterized by the interplay between Bloch oscillations and Landau-Zener transitions. When both gaps at quasi-energy values 0 and $π$ are vanishingly small, the Floquet dynamics follows a ballistic spreading.
