36 citations · 139 across the 14 of their papers we have counts for
14 papers
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…
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…
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…
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…
Edge states in quantum spin chains: the interplay among interaction, gradient magnetic field and Floquet engineering
Wenjie Liu, Bo Zhu, Li Zhang +2
We explore the edge defects induced by spin-spin interaction in a finite paradigmatic Heisenberg spin chain. By introducing a gradient magnetic field and a periodically-modulated s…
Mobility edge of Stark many-body localization
Li Zhang, Yongguan Ke, Wenjie Liu +1
We investigate many-body localization of interacting spinless fermions in a one-dimensional disordered and tilted lattice. The fermions undergo energy-dependent transitions from er…
Magnetic phase transitions of insulating spin-orbit coupled Bose atoms in one-dimensional optical lattices
Li Zhang, Yongguan Ke, Chaohong Lee
We consider the insulating spin-orbit coupled Bose atoms confined within one-dimensional optical lattices and explore their ground-state magnetic phase transitions. Under strong in…
Bloch oscillations of multi-magnon excitations in a Heisenberg XXZ chain
Wenjie Liu, Yongguan Ke, Li Zhang +1
The studies of multi-magnon excitations will extend our understandings of quantum magnetism and strongly correlated matters. Here, by using the time-evolving block decimation algor…
Topological invariant and cotranslational symmetry in strongly interacting multi-magnon systems
Xizhou Qin, Feng Mei, Yongguan Ke +2
It is still an outstanding challenge to characterize and understand the topological features of strongly interacting states such as bound-states in interacting quantum systems. Her…
Cluster Mean-Field Signature of Entanglement Entropy in Bosonic Superfluid-Insulator Transitions
Li Zhang, Xizhou Qin, Yongguan Ke +1
Entanglement entropy (EE), a fundamental conception in quantum information for characterizing entanglement, has been extensively employed to explore quantum phase transitions (QPTs…
Topological magnon bound-states in periodically modulated Heisenberg XXZ chains
Xizhou Qin, Feng Mei, Yongguan Ke +2
Strongly interacting topological states in multi-particle quantum systems pose great challenges to both theory and experiment. Recently, bound states of elementary spin waves (magn…