142 citations · 1.3k across the 56 of their papers we have counts for
57 papers
Real-space construction and selection rules of center-of-mass momentum eigenstates in two-dimensional many-body lattices
Ling Lin, Yongguan Ke, Chaohong Lee
We present a comprehensive framework for the real-space construction of center-of-mass (c.m.) momentum eigenstates in two-dimensional (2D) quantum many-body systems. Unlike standar…
Weak ergodicity breaking without nonthermal eigenstates
Boning Huang, Yongguan Ke, Li Zhang +2
The typical mechanisms of ergodicity breaking in isolated interacting quantum systems, such as many-body localization and quantum many-body scars, originate from the nonthermal nat…
Localization and scattering of a photon in quasiperiodic qubit arrays
Xinyin Zhang, Yongguan Ke, Zhengzhi Peng +4
We study the localization and scattering of a single photon in a waveguide coupled to qubit arrays with quasiperiodic spacings. As the quasiperiodic strength increases, localized s…
Correlated dynamics of three-particle bound states induced by emergent impurities in Bose-Hubbard model
Wenduo Zhao, Boning Huang, Yongguan Ke +1
Bound states, known as particles tied together and moving as a whole, are profound correlated effects induced by particle-particle interactions. While dimer-monomer bound states ar…
Photonic scattering in 2D waveguide QED: Quantum Goos-Hänchen shift
Yongguan Ke, Zhenzhi Peng, Muhib Ullah +1
Quantum emitters coupled to traveling photons in waveguides, known as waveguide quantum electrodynamics (WQED), offer a powerful platform for understanding light-matter interaction…
Diagnosing Floquet Chern and anomalous topological insulators based on Bloch oscillations
Maowu Zuo, Yongguan Ke, Zhoutao Lei +1
It is challenging to distinguish Floquet Chern insulator (FCI) and Floquet anomalous topological insulator (FATI) because of their common features of chiral edge states and far awa…
Nonlinear topological pumping of edge solitons
Xinrui You, Liaoyuan Xiao, Yongguan Ke +1
We study how nonlinear strength affects topological pumping of edge solitons by using nonlinear Gross-Pitaevskii equation. For weak nonlinear strength, the introduction of nonlinea…
One-dimensional -classified topological crystalline insulator under space-time inversion symmetry
Ling Lin, Yongguan Ke, Chaohong Lee
We explore a large family of one-dimensional (1D) topological crystalline insulators (TCIs) classified by invariants protected by space-time inversion symmetry. This f…
Zero-energy Quantum Many-Body Scar under Emergent Chiral Symmetry and Pseudo Hilbert Space Fragmentation
Li Zhang, Yongguan Ke, Chaohong Lee
Hilbert space fragmentation (HSF) is a mechanism for generating quantum many-body scar (QMBS), which provides a route to weakly break ergodicity. The zero-energy QMBSs widely exist…
Shortcuts to adiabatic Thouless pumping
Wenjie Liu, Yongguan Ke, Chaohong Lee
Thouless pumping, the quantized transport of particles in a cyclic adiabatic evolution, faces a challenge: slow driving may exceed the coherent time, while fast driving may break q…
Topological pumping induced by spatiotemporal modulation of interaction
Boning Huang, Yongguan Ke, Wenjie Liu +1
Particle-particle interaction provides a new degree of freedom to induce novel topological phenomena. Here, we propose to use spatiotemporal modulation of interaction to realize to…
Interaction-induced multiparticle bound states in the continuum
Boning Huang, Yongguan Ke, Honghua Zhong +2
Bound states in the continuum (BICs) are localized modes residing in the radiation continuum. They were first predicted for single-particle states, and became a general feature of…
Floquet Engineering of Hilbert Space Fragmentation in Stark Lattices
Li Zhang, Yongguan Ke, Ling Lin +1
The concept of Hilbert space fragmentation (HSF) has recently been put forward as a routine to break quantum ergodicity. Although HSF exists widely in models with dynamical constra…
Calculations of Chern number: equivalence of real-space and twisted-boundary-condition formulae
Ling Lin, Yongguan Ke, Li Zhang +1
Chern number is a crucial invariant for characterizing topological feature of two-dimensional quantum systems. Real-space Chern number allows us to extract topological properties o…
Interaction-induced topological pumping in a solid-state quantum system
Ziyu Tao, Wenhui Huang, Jingjing Niu +24
As the basis for generating multi-particle quantum correlations, inter-particle interaction plays a crucial role in collective quantum phenomena, quantum phase transitions, and qua…
Topological inverse band theory in waveguide quantum electrodynamics
Yongguan Ke, Jiaxuan Huang, Wenjie Liu +2
Topological phases play a crucial role in the fundamental physics of light-matter interaction and emerging applications of quantum technologies. However, the topological band theor…
Topological invariants for interacting systems: from twisted boundary condition to center-of-mass momentum
Ling Lin, Yongguan Ke, Chaohong Lee
Beyond the well-known topological band theory for single-particle systems, it is a great challenge to characterize the topological nature of interacting multi-particle quantum syst…
Correlated topological pumping of interacting bosons assisted by Bloch oscillations
Wenjie Liu, Shi Hu, Li Zhang +2
Thouless pumping, not only achieving quantized transport but also immune to moderate disorder, has attracted growing attention in both experiments and theories. Here, we explore ho…
Stable interaction-induced Anderson-like localization embedded in standing waves
Na Zhang, Yongguan Ke, Ling Lin +2
We uncover the interaction-induced \emph{stable self-localization} of bosons in disorder-free superlattices. In these nonthermalized multi-particle states, one of the particles for…
Nonparaxiality-triggered Landau-Zener transition in topological photonic waveguides
An Xie, Shaodong Zhou, Kelei Xi +6
Photonic lattices have been widely used for simulating quantum physics, owing to the similar evolutions of paraxial waves and quantum particles. However, nonparaxial wave propagati…
Magnon boundary states tailored by longitudinal spin-spin interactions and topology
Wenjie Liu, Yongguan Ke, Zhoutao Lei +1
Since longitudinal spin-spin interaction is ubiquitous in magnetic materials, it is very interesting to explore the interplay between topology and longitudinal spin-spin interactio…
Asymmetric topological pumping in nonparaxial photonics
Qingqing Cheng, Huaiqiang Wang, Yongguan Ke +5
Topological photonics was initially inspired by the quantum-optical analogy between the Schrödinger equation for an electron wavefunction and the paraxial equation for a light beam…
Uncover band topology via quantized drift in two-dimensional Bloch oscillations
Bo Zhu, Shi Hu, Honghua Zhong +1
We propose to measure band topology via quantized drift of Bloch oscillations in a two-dimensional Harper-Hofstadter lattice subjected to tilted fields in both directions. When the…
Real-space representation of winding number for one-dimensional chiral-symmetric topological insulator
Ling Lin, Yongguan Ke, Chaohong Lee
The winding number has been widely used as an invariant for diagnosing topological phases in one-dimensional chiral-symmetric systems. We put forward a real-space representation fo…