1. Subharmonic oscillations in the Floquet circuit with the frequency-synthesis dimension
- Author
-
Lv, Bo, Xia, Shiyun, Tian, Ye, Liu, Ting, Mu, Hongyang, Shen, Zhichao, Wang, Sijie, Zhu, Zheng, Tao, Huibin, Meng, Fanyi, and Shi, Jinhui
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Other Condensed Matter - Abstract
The period-doubling oscillation emerges with the coexistence between zero and {\pi} modes in Floquet topological insulator. Here, utilized the flexibility of the circuit, we construct the Floquet circuit with frequency-synthetic dimension and find the topological-protected deeply-subharmonic oscillations with the period extensively exceeding the doubling-driven period. In the construction framework, the periodically-driven mechanism is attained by implementing the circuit-oscillator hierarchy with the stepping-variation resonances in frequency domain. The zero and {\pi} modes that arise at the Floquet band in the circuit indicate the anomalous boundary-bulk correspondence. The coexistence of zero and {\pi} modes, results in a subharmonic oscillation with the extremely-low frequency on the edge of the Floquet circuit. Furthermore, we explore the Floquet band with the enhanced periodically-driven strength tailored by the component flexibility of the circuit. Our method provides a flexible scheme to study Floquet topological phases, and open a new path for realizing the deeply subwavelength system., Comment: 31 pages, 10 figures
- Published
- 2024