论文标题
扭曲晶格中局部冷凝物的部分量子复兴
Partial quantum revivals of localized condensates in distorted lattices
论文作者
论文摘要
我们报告了一个近乎平坦的晶格带中的短laguerre-gaussian脉冲负载的玻色子的特殊传播。以kagome晶格中的激子 - 孔子系统为例，我们表明，如果考虑到各向异性，则最初定位的冷凝物在空间的特定方向上传播。这种传播由整个紧凑型状态的量子跳跃，崩溃和复兴组成，并且在各向异性的任何方向下，它持续存在。该属性在紧密结合模型中揭示了它的签名，而且令人惊讶的是，它在连续模型中更为明显。量子复兴对颗粒的排斥相互作用和有限的寿命是可靠的。由于不需要磁场或自旋轨道交互，因此该系统提供了一种易于实现的新型光学逻辑。
We report on a peculiar propagation of bosons loaded by a short Laguerre-Gaussian pulse in a nearly flat band of a lattice potential. Taking a system of exciton-polaritons in a kagome lattice as an example, we show that an initially localized condensate propagates in a specific direction in space if anisotropy is taken into account. This propagation consists of quantum jumps, collapses, and revivals of the whole compact states, and it persists given any direction of anisotropy. This property reveals its signatures in the tight-binding model and, surprisingly, it is much more pronounced in a continuous model. Quantum revivals are robust to the repulsive interaction and finite lifetime of the particles. Since no magnetic field or spin-orbit interaction is required, this system provides a new kind of easily implementable optical logic.
