ICFO-Institut de Ciències Fotòniques, Parc Mediterrani de la Tecnologia, E-08860 Castelldefels, Spain.
Phys Rev Lett. 2012 Oct 5;109(14):145301. doi: 10.1103/PhysRevLett.109.145301.
Time-periodic driving like lattice shaking offers a low-demanding method to generate artificial gauge fields in optical lattices. We identify the relevant symmetries that have to be broken by the driving function for that purpose and demonstrate the power of this method by making concrete proposals for its application to two-dimensional lattice systems: We show how to tune frustration and how to create and control band touching points like Dirac cones in the shaken kagome lattice. We propose the realization of a topological and a quantum spin Hall insulator in a shaken spin-dependent hexagonal lattice. We describe how strong artificial magnetic fields can be achieved for example in a square lattice by employing superlattice modulation. Finally, exemplified on a shaken spin-dependent square lattice, we develop a method to create strong non-abelian gauge fields.
周期性驱动，如晶格振动，为在光学晶格中产生人工规范场提供了一种低要求的方法。我们确定了为此目的必须打破的相关对称性，并通过对二维晶格系统的具体应用展示了该方法的威力：我们展示了如何调整受挫，以及如何在振动 kagome 晶格中创建和控制带接触点，如狄拉克锥。我们提出了在振动的自旋相关六方晶格中实现拓扑和量子自旋霍尔绝缘体的方案。我们描述了如何通过超晶格调制在例如正方形晶格中实现强人工磁场。最后，我们以振动的自旋相关正方形晶格为例，开发了一种创建强非阿贝尔规范场的方法。
