174 citations · 2.7k across the 111 of their papers we have counts for
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Exact solution of the one-dimensional Hubbard model with arbitrary boundary magnetic fields
Yuan-Yuan Li, Junpeng Cao, Wen-Li Yang +2
The one-dimensional Hubbard model with arbitrary boundary magnetic fields is solved exactly via the Bethe ansatz methods. With the coordinate Bethe ansatz in the charge sector, the…
Doublon-holon binding, Mott transition, and fractionalized antiferromagnet in the Hubbard model
Sen Zhou, Yupeng Wang, Ziqiang Wang
We argue that the binding between doubly occupied (doublon) and empty (holon) sites governs the incoherent excitations and plays a key role in the Mott transition in strongly corre…
Quantum Spinon Oscillations
Zi Cai, Lei Wang, X. C. Xie +4
The full quantum dynamics of a spinon under external magnetic fields is investigated by using the time-evolving block decimation (TEBD) method within the microcanonical picture of…
Hidden Sp(2s+1)- or SO(2s+1)-symmetry and new exactly solvable models in ultracold atomic systems
Yuzhu Jiang, Junpeng Cao, Yupeng Wang
The high spin ultracold atom models with a special form of contact interactions, i.e., the scattering lengthes in the total spin- channels are equal but may be differen…
Cooperative order and excitation spectra in the bicomponent spin networks
Bao Xu, Han-Ting Wang, Yupeng Wang
A ferrimagnetic spin model composed of spin-dimers and spin-chains is studied by combining the bond-operator representation (for spin-dimers) and Holstein-P…
Exact Solutions of a One-dimensional Quantum Spin Chain with SO(5)-Symmetry
Yuzhu Jiang, Junpeng Cao, Yupeng Wang
A new exactly solvable one-dimensional spin-3/2 Heisenberg model with SO(5)-invariance is proposed. The eigenvalues and Bethe ansatz equations of the model are obtained by using th…
Exact solutions of an SO(5)-invariant spin-3/2 Fermi gas model
Yuzhu Jiang, Junpeng Cao, Yupeng Wang
An exactly solvable model describing the dilute spin-3/2 fermion gas in one-dimensional optical trap is proposed. The diagonalization of the model Hamiltonian is derived by means o…
Conservation laws of the Haldane-Shastry type spin chains
Junpeng Cao, Peng He, Yuzhu Jiang +1
A systematic method to construct the complete set of conserved quantities of the Haldane-Shastry type spin chains is proposed. The hidden relationship between the Yang-Baxter relat…
Spontaneous trimerization in two-dimensional Antiferromagnets
Zi Cai, Shu Chen, Yupeng Wang
In this paper, we propose a novel quantum paramagnetic state in two-dimensional antiferromagnets: the spontaneously trimer state, which is constructed by the trimers of spins. Each…
Exact solution for infinitely strongly interacting Fermi gases in tight waveguides
Liming Guan, Shu Chen, Yupeng Wang +1
We present an exact analytical solution of the fundamental systems of quasi-one-dimensional spin-1/2 fermions with infinite repulsion for arbitrary confining potential. The eigenfu…
Two-dimensional spin-1 frustrated Heisenberg model with valence-bond ground states
Zi Cai, Shu Chen, Supeng Kou +1
In this paper, we propose a method to understand the nature for the quantum disorder phase of the two-dimensional (2D) high spin frustrated model. The ground state and excitation p…
Paired state in an integrable spin-1 boson model
Junpeng Cao, Yuzhu Jiang, Yupeng Wang
An exactly solvable model describing the low density limit of the spin-1 bosons in a one-dimensional optical lattice is proposed. The exact Bethe ansatz solution shows that the low…
Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit
Shu Chen, Li Wang, Yupeng Wang
We study the ground-state properties of frustrated Heisenberg ferrimagnetic ladders with antiferromagnetic exchange interactions and two types of alternating sublattice spins. In t…
Partial entropy in finite-temperature phase transitions
Junpeng Cao, Xiaoling Cui, Zhang Qi +3
It is shown that the von Neumann entropy, a measure of quantum entanglement, does have its classical counterpart in thermodynamic systems, which we call partial entropy. Close to t…
One-dimensional spin pyrochlore lattice: exact ground state and elementary excitations
Shu Chen, Yupeng Wang, W. Q. Ning +2
We study the antiferromagnetic spin exchange models with and S=1 on a one-dimensional tetrahedron chain by both analytical and numerical approaches. The system is shown to…
Exact spontaneous plaquette ground states for high-spin ladder models
Shu Chen, Congjun Wu, Shou-Cheng Zhang +1
We study the exchange physics in high spin Mott insulating systems with which is realizable in ultracold atomic systems. The high symmetry of SO(5) or SU(4) therein renders…
Spin Transport Properties in Heisenberg Antiferromagnetic Spin Chains: Spin Current induced by Twisted Boundary Magnetic Fields
Wei Zhuo, Xiaoqun Wang, Yupeng Wang
Spin transport properties of the one-dimensional Heisenberg antiferromagnetic spin systems for both and S=1 are studied by applying twisted boundary magnetic field. The spi…
Exact solutions and elementary excitations in the XXZ spin chain with unparallel boundary fields
Junpeng Cao, Hai-Qing Lin, Kang-jie Shi +1
By using a set of gauge transformations, the exact solutions of the XXZ spin chain with unparallel boundary magnetic fields are derived in the framework of the algebraic Bethe ansa…
Exact Solution of Heisenberg-liquid models with long-range coupling
Yupeng Wang, P. Schlottmann
We present the exact solution of two Heisenberg-liquid models of particles with arbitrary spin interacting via a hyperbolic long-range potential. In one model the spin-spin cou…
Coqblin-Schrieffer impurity in a singular metal
Yupeng Wang, P. Schlottmann
A Coqblin-Schrieffer impurity of spin coupled to the boundary of an open SU(N)-invariant chain with is studied. The model is integrable as a function of one co…
Open su(4)-invariant spin ladder with boundary defects
Yupeng Wang, P. Schlottmann
The integrable su(4)-invariant spin-ladder model with boundary defect is studied using the Bethe ansatz method. The exact phase diagram for the ground state is given and the bounda…
Absence of overscreened Kondo effect in ferromagnetic host
Jianhui Dai, Yupeng Wang
We study the low temperature behavior of a boundary magnetic impurity S'=1/2 in an open ferromagnetic Takhatajian-Babujian spin-S chain. For antiferromagnetic Kondo coupling, it is…
Bounded Luttinger liquids as a universality class of quantum critical behavior
Johannes Voit, Yupeng Wang, Marco Grioni
We show that one-dimensional quantum systems with gapless degrees of freedom and open boundary conditions form a new universality class of quantum critical behavior, which we propo…
Exact solution of a Kondo lattice model
Yupeng Wang
An integrable Kondo lattice model, which describes a strongly correlated electron host interacting with a spin-1/2 lattice, is proposed. It is found that with the variations of the…