376 citations · 7.2k across the 150 of their papers we have counts for
42 papers · 1 filter
Exact solution of the Bose Hubbard model with unidirectional hopping
Mingchen Zheng, Yi Qiao, Yupeng Wang +2
A one-dimensional Bose Hubbard model with unidirectional hopping is shown to be exactly solvable. Applying the algebraic Bethe ansatz method, we prove the integrability of the mode…
Topological Bose-Mott insulators in one-dimensional non-Hermitian superlattices
Zhihao Xu, Shu Chen
We study the topological properties of Bose-Mott insulators in one-dimensional non-Hermitian superlattices, which may serve as effective Hamiltonians for cold atomic optical system…
Dynamical topological invariant after a quantum quench
Chao Yang, Linhu Li, Shu Chen
We show how to define a dynamical topological invariant for general one-dimensional topological systems after a quantum quench. Focusing on two-band topological insulators, we demo…
Characterization of topological phases of modified dimerized Kitaev chain via edge correlation functions
Yucheng Wang, Jian-Jian Miao, Shu Chen
We study analytically a modified dimerized Kitaev chain model under both periodic and open boundary conditions and determine its phase diagram by calculating the topological number…
Exact solution to an interacting dimerized Kitaev model at symmetric point
Yucheng Wang, Jian-Jian Miao, Hui-Ke Jin +1
We study the interacting dimerized Kitaev chain at the symmetry point and the chemical potential under open boundary conditions, which can be exactly solved by applying…
-flux loop semimetals
Linhu Li, Stefano Chesi, Chuanhao Yin +1
We introduce a model of -flux loop semimetals which holds nodal loops described by a winding number . By adding some extra terms, this model can be transformed into a rece…
Generalized Aubry-André-Harper model with p-wave superconducting pairing
Qi-Bo Zeng, Shu Chen, Rong Lü
We investigate a generalized Aubry-André-Harper (AAH) model with p-wave superconducting pairing. Both the hopping amplitudes between the nearest neighboring lattice sites and the o…
Caution on emergent continuous symmetry: a Monte Carlo investigation of transverse-field frustrated Ising model on triangle and honeycomb lattices
Yan-Cheng Wang, Yang Qi, Shu Chen +1
Continuous symmetries are believed to emerge at many quantum critical points in frustrated magnets. In this work, we study two candidates of this paradigm: the transverse-field fru…
Topological invariants for phase transition points of one-dimensional topological systems
Linhu Li, Chao Yang, Shu Chen
We study topological properties of phase transition points of two topologically non-trivial classes (D and DIII) in one dimension by assigning a Berry phase defined…
Bosonic edge states in gapped honeycomb lattices
Huaiming Guo, Yuekun Niu, Shu Chen +1
By quantum Monte Carlo simulations of bosons in gapped honeycomb lattices, we show the existence of bosonic edge states. For single layer honeycomb lattice, bosonic edge states can…
Fractional Topological States in Quantum Spin Chains with Periodical Modulation
Haiping Hu, Huaiming Guo, Shu Chen
We report the findings of fractional topological states in one-dimensional periodically modulated quantum spin chains with up to third neighbor interactions. By exact numerical stu…
Phase diagram and topological superfluid state of spin-orbit coupled Fermi gas with attractive interactions in a one-dimensional optical lattice
Haiping Hu, Chen Cheng, Yucheng Wang +2
Based on density matrix renormalization group method, we investigate the spin-orbit coupled Fermi gas with attractive interactions in one-dimensional optical lattice and present a…
Winding numbers of phase transition points for one-dimensional topological systems
Linhu Li, Chao Yang, Shu Chen
We study topological properties of phase transition points of one-dimensional topological quantum phase transitions by assigning winding numbers defined on closed circles around th…
Quantum Hall Effects in a Non-Abelian Honeycomb Lattice
Ling Li, Ningning Hao, Guocai Liu +4
We study the tunable quantum Hall effects in a non-Abelian honeycomb optical lattice which is a many-Dirac-points system. We find that the quantum Hall effects present different fe…
Characterization of topological phase transitions via topological properties of transition points
Linhu Li, Shu Chen
We study topological properties of phase transition points of topological quantum phase transitions by assigning a topological invariant defined on a closed circle or surface surro…
Hidden-symmetry-protected topological phases on a one-dimensional lattice
Linhu Li, Shu Chen
We demonstrate the existence of topologically nontrivial phase in a one-dimensional fermionic lattice system subjected to synthetic gauge fields, which is beyond the standard Altla…
Topological incommensurate magnetization plateaus in quasi-periodic quantum spin chains
Hai-Ping Hu, Chen Cheng, Hong-Gang Luo +1
Uncovering topologically nontrivial states in nature is an intriguing and important issue in recent years. While most studies are based on the topological band insulators, the topo…
Topological nature of magnetization plateaus in periodically modulated quantum spin chains
Haiping Hu, Chen Cheng, Zhihao Xu +2
We unveil nontrivial topological properties of zero-temperature magnetization plateau states in periodically modulated quantum spin chains under a uniform magnetic field. As positi…
Geometric phase and quantum phase transition in an inhomogeneous periodic XY spin-1/2 model
Yu-Quan Ma, Shu Chen
The notion of geometric phase has been recently introduced to analyze the quantum phase transitions of many-body systems from the geometrical perspective. In this work, we study th…
Majorana fermions in density modulated p-wave superconducting wires
Li-Jun Lang, Shu Chen
We study the p-wave superconducting wire with a periodically modulated chemical potential and show that the Majorana edge states are robust against the periodic modulation. We find…
Absence of Wigner molecules in one-dimensional few-fermion systems with short-range interactions
Jing-Jing Wang, Wei Li, Shu Chen +3
We study by means of exact-diagonalization techniques the ground state of a few-fermion system with strong short-range repulsive interactions trapped by a harmonic potential in one…
The Euler Number of Bloch States Manifold and the Quantum Phases in Gapped Fermionic Systems
Yu-Quan Ma, Shi-Jian Gu, Shu Chen +2
We propose a topological Euler number to characterize nontrivial topological phases of gapped fermionic systems, which originates from the Gauss-Bonnet theorem on the Riemannian st…
Exact solutions of a one-dimensional mixture of spinor bosons and spinor fermions
Shi-Jian Gu, Junpeng Cao, Shu Chen +1
The exact solutions of a one-dimensional mixture of spinor bosons and spinor fermions with -function interactions are studied. Some new sets of Bethe ansatz equations are obtain…
Density-functional theory of two-component Bose gases in one-dimensional harmonic traps
Yajiang Hao, Shu Chen
We investigate the ground-state properties of two-component Bose gases confined in one-dimensional harmonic traps in the scheme of density-functional theory. The density-functional…