4 papers
Fate of moiré flat bands for a weakly repulsive Bose-Einstein condensate in one-dimensional -symmetric bichromatic optical lattices
Enhong Cheng, Yu Tan, Yanzhen Xu +1
One-dimensional (1D) superlattices provide one simplified platform for exploring moiré physics from a low-dimensional perspective, with the ratio of lattice constants playing a rol…
Electric circuit analog of Landau-Zener tunneling using time-varying elements
Enhong Cheng, Zheng Lian, Zezhou Chen +1
Landau-Zener tunneling (LZT) is a fundamental dynamical phenomenon, ubiquitous in various quantum systems. Here, we propose a time-varying electric circuit to address the question…
Asymmetric transfer matrix analysis of Lyapunov exponents in one-dimensional non-reciprocal quasicrystals
Shan-Zhong Li, Enhong Cheng, Shi-Liang Zhu +1
The Lyapunov exponent, serving as an indicator of the localized state, is commonly utilized to identify localization transitions in disordered systems. In non-Hermitian quasicrysta…
Dynamical robustness of topological end states in nonreciprocal Su-Schrieffer-Heeger models with open boundary conditions
Li-Jun Lang, Yijiao Weng, Yunhui Zhang +2
For non-Hermitian quantum models, the dynamics is apparently not reflected by the static properties, e.g., the complex energy spectrum, because of the nonorthogonality of the right…