论文标题
耗散引起的扁平带
Dissipation Induced Flat Bands
论文作者
论文摘要
平面带是实现非常规电子相的理想环境。在这里，我们表明，由Bloch Lindbladian管辖的耗散系统可以实现无散的频带，以与适当设计的浴室相连。这些平坦的频段出现在系统环境耦合的“黑暗空间”中，并凭借对称性保护免受耗散的影响而长期存在。我们对带有和没有自旋的一般一条和两个带模型表现出这种机制的鲁棒性，并讨论了它们的实验实现条件，例如在超导底物上的2D材料中。
Flat bands are an ideal environment to realize unconventional electronic phases. Here, we show that fermionic systems with dissipation governed by a Bloch Lindbladian can realize dispersionless bands for sufficiently strong coupling to an appropriately engineered bath. These flat bands emerge in a "dark space" of the system-environment coupling and are long-lived by virtue of symmetry protection from dissipation. We exhibit the robustness of this mechanism for general one and two band models with and without spin, and discuss conditions for their experimental realization such as in a 2D material on a superconducting substrate.
