Floquet-surface bound states in the continuum in a resonantly driven one-dimensional tilted defect-free lattice
Floquet-surface bound states in the continuum in a resonantly driven one-dimensional tilted defect-free lattice
复制标题
共振驱动一维倾斜无缺陷晶格中连续体中的小团表面束缚态
DOI：
10.1103/physreva.102.023303
复制
发表时间：
2020
影响因子：
2.9
通讯作者：
Zhong Honghua
中科院分区：
文献类型：
--
作者：
Zhu Bo;Ke Yongguan;Liu Wenjie;Zhou Zheng;Zhong Honghua
我们研究了共振驱动的一维倾斜无缺陷晶格中的Floquet表面束缚态嵌入连续介质（BIC）和连续介质外的束缚态（博茨）。在对比脆弱的单粒子BIC协助特别定制的潜力，我们发现，Floquet表面BIC，稳定的结构扰动，可以存在于一个广泛的参数空间。通过在高频极限下的多时间尺度渐近分析，Floquet表面束缚态的出现可以用周期性驱动和倾斜之间的共振引起的边界处的有效Tamm-type缺陷来解析地解释。现有的Floquet表面态的相边界也解析地给出。基于表面态的排斥效应，我们提出用量子行走的方法来检测跃迁点和测量Floquet表面束缚态的数目。我们的工作为在量子系统中实验实现BIC打开了一扇新的大门。
We study the Floquet-surface bound states embedded in the continuum (BICs) and bound states out the continuum (BOCs)in a resonantly driven 1D tilted defect-free lattice. In contrast to fragile single-particle BICs assisted by specially tailored potentials, we find that Floquet-surface BICs, stable against structural perturbations, can exist in a wide range of parameter space. By using a multiple-time-scale asymptotic analysis in the high-frequency limit, the appearance of Floquet-surface bound states can be analytically explained by effective Tamm-type defects at boundaries induced by the resonance between the periodic driving and tilt. The phase boundary of existing Floquet-surface states is also analytically given. Based on the repulsion effect of surface states, we propose to detect transition points and measure the number of Floquet-surface bound states by quantum walk. Our work opens a new door to experimental realization of BICs in quantum system.