Cai, Xiaoming, Chen, Shu, Wang, Yupeng
We study superfluid to Anderson insulator transition of strongly repulsive Bose gas in a one dimensional incommensurate optical lattice. In the hard core limit, the Bose-Fermi mapping allows us to...
Interaction-induced anomalous transport behavior in one dimensional optical lattice (2009)
Cai, Zi, Wang, Lei, Xie, X. C., Wang, Yupeng
The non-equilibrium dynamics of spin impurity atoms in a strongly interacting one-dimensional (1D) Bose gas under the gravity field is studied. We show that due to the non-equilibrium preparation of...
Resonance Scattering in Optical Lattices and Molecules: Interband versus Intraband Effects (2009)
Cui, Xiaoling, Wang, Yupeng, Zhou, Fei
We study the low-energy two-body scattering in optical lattices with all higher-band effects included in an effective potential, using a renormalization group approach. As the potential depth reaches...
D-wave bosonic pair in an optical lattice (2009)
Cai, Zi, Wang, Lei, Li, Jian, Chen, Shu, Xie, X. C., Wang, Yupeng
We present a bosonic model, in which two bosons may form a bound pair with d-wave symmetry via the four-site ring exchange interaction. A d-wave pairing superfluid as well as a d-wave density wave...
Bose-Fermi mixture in one-dimensional optical lattices with hard-core interactions (2009)
Cai, Xiaoming, Guan, Liming, Chen, Shu, Hao, Yajiang, Wang, Yupeng
We study a mixture of $N_{b}$ bosons with point hard-core boson-boson interactions and $N_{f}$ noninteracting spinless fermions with point hard-core boson-fermion interactions in 1D optical lattice...
Cooperative order and excitation spectra in the bicomponent spin networks (2009)
Xu, Bao, Wang, Han-Ting, Wang, Yupeng
A ferrimagnetic spin model composed of $S=1/2$ spin-dimers and $S=5/2$ spin-chains is studied by combining the bond-operator representation (for $S=1/2$ spin-dimers) and Holstein-Primakoff...
Multiple antenna technologies (2009)
Mohaisen, Manar, Wang, YuPeng, Chang, KyungHi
Multiple antenna technologies have received high attention in the last few decades for their capabilities to improve the overall system performance. Multiple-input multiple-output systems include a...
Hao, Ningning, Zhang, Wei, Wang, Zhigang, Wang, Yupeng, Zhang, Ping
We study a bilayer two-dimension-electron-gas (2DEG) adjacent to a type-II superconductor thin film with a pinned vortex lattice. We find that with increasing interlayer tunneling, the system of half...
Exact Solutions of a One-dimensional Quantum Spin Chain with SO(5)-Symmetry (2009)
Jiang, Yuzhu, Cao, Junpeng, Wang, Yupeng
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 the nested algebraic...
Polarized Fermi gases in asymmetric optical lattices (2009)
We present the zero temperature phase diagrams of imbalanced two species fermions in asymmetric optical lattices, based on the exact spectrum rather than the Fermi-Hubbard model. The crossover of the...
Magnetic impurities in the two-band $s_\pm$-wave superconductors (2009)
We investigate the effects of magnetic impurities in a superconducting state with $s_\pm$ pairing symmetry. Within a two-band model, we find that the intra-band magnetic scattering serves as a pair...
Phase diagram of imbalanced fermions in optical lattices (2009)
The zero temperature phase diagrams of imbalanced two species fermions in 3D optical lattices are investigated to evaluate the validity of the Fermi-Hubbard model. It is found that depending on the...
A Comprehensive Analysis of Gene Expression Evolution Between Humans and Mice (2009)
Evolutionary changes in gene expression account for most phenotypic differences between species. Advances in microarray technology have made the systematic study of gene expression evolution...
Exact solutions of an SO(5)-invariant spin-3/2 Fermi gas model (2008)
Jiang, Yuzhu, Cao, Junpeng, Wang, Yupeng
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 of the Bethe ansatz...
Topological edge states and quantum Hall effect in the Haldane model (2008)
Hao, Ningning, Zhang, Ping, Wang, Zhigang, Zhang, Wei, Wang, Yupeng
We study the topological edge states of the Haldane's graphene model with zigzag/armchair lattice edges. The Harper equation for solving the energies of the edge states is derived. The results show...
Conservation laws of the Haldane-Shastry type spin chains (2008)
Cao, Junpeng, He, Peng, Jiang, Yuzhu, Wang, Yupeng
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 relation and the...
Spontaneous trimerization in two-dimensional Antiferromagnets (2008)
Cai, Zi, Chen, Shu, Wang, Yupeng
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 trimer is a...
Exact solution for infinitely strongly interacting Fermi gases in tight waveguides (2008)
Guan, Liming, Chen, Shu, Wang, Yupeng, Ma, Zhong-Qi
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 eigenfunctions are...
Quantum-Fluctuation-Driven Coherent Spin Dynamics in Small Condensates (2008)
Cui, Xiaoling, Wang, Yupeng, Zhou, Fei
We have studied quantum spin dynamics of small condensates of cold sodium atoms. For a condensate initially prepared in a mean field ground state, we show that coherent spin dynamics are {\em purely}...
Properties of A Class of Topological Phase Transition (2008)
Cai, Zi, Chen, Shu, Kou, Supeng, Wang, Yupeng
The properties of a class of topological quantum phase transition (TQPT) are analyzed based on a model proposed by Haldane. We study the effect of finite temperature on this phase transition. We have...
The minimum model for the iron-based superconductors (2008)
A single band $t$-$U$-$J_1$-$J_2$ model is proposed as the minimum model to describe the superconductivity of the newly discovered iron-based superconductors $R(O_{1-x}F_x)FeAs$ and $RO_{1-x}FeAs$...
Xiong, Gang, Wang, Shidong, Niu, Q., Wang, Yupeng, Wang, Xiang-Rong
The effect of the inter-Landau-band overlap on electron localization in integer quantum Hall systems is studied. A narrow band of extended electronic states is formed near each Landau band center due...
Chen, Shu, Wang, Li, Hao, Yajiang, Wang, Yupeng
The notion of fidelity in quantum information science has been recently applied to analyze quantum phase transitions from the viewpoint of the ground state (GS) overlap for various many-body systems....
Chen, Shu, Wang, Li, Gu, Shi-Jian, Wang, Yupeng
In this paper, we investigate the fidelity for the Heisenberg chain with the next-nearest-neighbor interaction (or the $J_1-J_2$ model) and analyze its connections with quantum phase transition. We...
Two-dimensional spin-1 frustrated Heisenberg model with valence-bond ground states (2006)
Cai, Zi, Chen, Shu, Kou, Supeng, Wang, Yupeng
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 properties of a...
Paired state in an integrable spin-1 boson model (2006)
Cao, Junpeng, Jiang, Yuzhu, Wang, Yupeng
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 energy physics of...
Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit (2006)
Chen, Shu, Wang, Li, Wang, Yupeng
We study the ground-state properties of frustrated Heisenberg ferrimagnetic ladders with antiferromagnetic exchange interactions and two types of alternating sublattice spins. In the limit of strong...
Partial entropy in finite-temperature phase transitions (2006)
Cao, Junpeng, Cui, Xiaoling, Qi, Zhang, Lu, Wengang, Niu, Qian, Wang, Yupeng
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 the critical...
One-dimensional spin pyrochlore lattice: exact ground state and elementary excitations (2006)
Chen, Shu, Wang, Yupeng, Ning, W. Q., Wu, Congjun, Lin, H. Q.
We study the antiferromagnetic spin exchange models with $S=1/2$ and S=1 on a one-dimensional tetrahedron chain by both analytical and numerical approaches. The system is shown to be effectively...
Xiong, Gang, Wang, Shidong, Niu, Q., Wang, Yupeng, Xie, X. C., Tian, De-Cheng, ...
The mixing of states with opposite chiralities in a quantum Hall system is shown to have a delocalization effect. It is possible that extended states may form bands because of this mixing, as is...
Xiong, Gang, Wang, Shi-Dong, Niu, Qian, Wang, Yupeng, Xie, X. C., Tian, De-Cheng, ...
The mixing of states with {\it opposite chirality} in quantum Hall system is shown to have delocalization effect. It is possible that extended states may form bands because of this mixing, as is...
Quantum phase transitions in a spin ladder with long-range couplings (2005)
Cao, Junpeng, Xiong, Gang, Xie, X. C., Wang, Xiang-Rong, Wang, Yupeng
An integrable model with rich ground state phases is hard to come by. In this Letter, an integrable spin ladder with pure long-range Heisenberg couplings is proposed and solved via the asymptotic...
Self-sustained current oscillations in superlattices and the van der Pol equation (2005)
Sun, Zhouzhou, Cao, Junpeng, Yin, S., Wang, Yupeng, Wang, Y. Q., Wang, Xiang-Rong
The connection between self-sustained current oscillations (SSCOs) in superlattices and the famous van der Pol (vdP) equation is established by mapping a widely used model of SSCOs to the vdP...
Exact spontaneous plaquette ground states for high-spin ladder models (2005)
Chen, Shu, Wu, Congjun, Zhang, Shou-Cheng, Wang, Yupeng
We study the exchange physics in high spin Mott insulating systems with $S=3/2$ which is realizable in ultracold atomic systems. The high symmetry of SO(5) or SU(4) therein renders stronger quantum...
Quantum size effects on the perpendicular upper critical field in ultra-thin lead films (2005)
Bao, Xin-Yu, Zhang, Yan-Feng, Wang, Yupeng, Jia, Jin-Feng, Xue, Qi-Kun, Xie, X. C., ...
We report the thickness-dependent (in terms of atomic layers) oscillation behavior of the perpendicular upper critical field $H_{c2\perp}$ in the ultra-thin lead films at the reduced temperature...
Magnetic impurity effect on the entanglement in the Ising model (2005)
Cao, Junpeng, Sun, Zhouzhou, Yin, S., Wang, Yupeng, Wang, Xiang-Rong
We study the effect of magnetic impurity on the entanglement in the three-site Ising model with both periodic and open boundary conditions. We obtain the analytic expressions for entanglement and...
Zhuo, Wei, Wang, Xiaoqun, Wang, Yupeng
Spin transport properties of the one-dimensional Heisenberg antiferromagnetic spin systems for both $S=1/2$ and S=1 are studied by applying twisted boundary magnetic field. The spin current displays...
Reply to the comment on "Do intradot electron-electron interactions induce dephasing?" (2004)
Jiang, Zhao-tan, Sun, Qing-feng, Xie, X. C., Wang, Yupeng
In the comment by Konig, Gefen, and Silva, their main point is to question the approximation we used in solving the Green's function. They believe that this approximative method is inappropriate to...
Do intradot electron-electron interactions induce dephasing? (2004)
Jiang, Zhao-tan, Sun, Qing-feng, Xie, X. C., Wang, Yupeng
We investigate the degree of coherence of electronic transport through a quantum dot (QD) in the presence of an intradot electron-electron interaction. By using an open multi-terminal Aharonov-Bohm...
Newhouse, Kathleen, Hsuan, Shih-Ling, Chang, Sandra H., Cai, Beibei, Wang, Yupeng, Xia, Zhengui
Rotenone is a naturally derived pesticide that has recently been shown to evoke the behavioral and pathological symptoms of Parkinsons disease in animal models. Though rotenone is known to be an...
Newhouse, Kathleen, Hsuan, Shih-Ling, Chang, Sandra H., Cai, Beibei, Wang, Yupeng, Xia, Zhengui
Rotenone is a naturally derived pesticide that has recently been shown to evoke the behavioral and pathological symptoms of Parkinson's disease in animal models. Though rotenone is known to be an...
Anomalous Kondo effect of indirectly coupled double quantum dots (2003)
Sun, Qing-feng, Guo, Hong, Wang, Yupeng
We report theoretical investigations of indirectly coupled double quantum dots (QD) side connected to an one-dimensional quantum wire. Due to quantum interference controlled by the parameter $k_F L$,...
The effect of inter-Landau-band mixing on extended states in quantum Hall system (2003)
Xiong, Gang, Wang, Shi-Dong, Niu, Qian, Wang, Yupeng, Xie, X. C., Tian, De-Cheng, ...
The effect of inter-Landau-band mixing on electron localization in an integer quantum Hall system is studied. We find that mixing of localized states with {\it opposite chirality} tends to delocalize...
Cao, Junpeng, Lin, Hai-Qing, Shi, Kang-jie, Wang, Yupeng
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 ansatz. In the...
Non-exclusion statistics: a generalization of Bose-Einstein's principle (2001)
By constructing the super-particle representation of the free boson gas, we propose a new statistics in which the particles are non-exclusive. This statistics can be considered as a generalization of...
Exact Solution of Heisenberg-liquid models with long-range coupling (2001)
We present the exact solution of two Heisenberg-liquid models of particles with arbitrary spin $S$ interacting via a hyperbolic long-range potential. In one model the spin-spin coupling has the...
Coqblin-Schrieffer impurity in a singular metal (2000)
A Coqblin-Schrieffer impurity of spin $S$ coupled to the boundary of an open SU(N)-invariant $t-J$ chain with $N = 2S+2$ is studied. The model is integrable as a function of one coupling parameter...
Open su(4)-invariant spin ladder with boundary defects (2000)
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 boundary quantum critical...
Absence of overscreened Kondo effect in ferromagnetic host (2000)
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 show via Bethe...
Bounded Luttinger liquids as a universality class of quantum critical behavior (1999)
Voit, Johannes, Wang, Yupeng, Grioni, Marco
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 propose to call...
Modulation structure of a frustrated spin ladder (1999)
We study a two-leg spin-1/2 ladder with isotropic exchanges and biquadratic interactions in the basic plaquettes. It is shown that for the extremely frustrated case, the system exhibits a...
Exact solution of a Kondo lattice model (1999)
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 Kondo coupling J,...
Enhancement of pair correlation in a one-dimensional hybridization model (1999)
Wang, Yupeng, Dai, Jian-Hui, Pu, Fu-Cho, Eckern, Ulrich
We propose an integrable model of one-dimensional (1D) interacting electrons coupled with the local orbitals arrayed periodically in the chain. Since the local orbitals are introduced in a way that...
Kondo effect in a quantum critical ferromagnet (1999)
We study the Heisenberg ferromagnetic spin chain coupled with a boundary impurity. Via Bethe ansatz solution, it is found that (i) for J>0, the impurity spin behaves as a diamagnetic center and is...
Exact solution of a spin-ladder model (1999)
An integrable spin-ladder model with nearest-neighbor exchanges and biquadratic interactions is proposed. With the Bethe ansatz solutions of the model hamiltonian, it is found that there are three...
Exactly solvable Kondo problem in the open $t-J$ chains (1998)
We study the problem of a boundary magnetic impurity coupled with the solvable $t-J$ chains. Our model provides a good start point to understand the Kondo problem in a Luttinger liquid as well as in...
Ghost spins and novel quantum critical behavior in a spin chain with local bond-deformation (1998)
Dai, Jian-Hui, Wang, Yupeng, Eckern, U.
We study the boundary impurity-induced critical behavior in an integrable SU(2)-invariant model consisting of an open Heisenberg chain of arbitrary spin-$S$ (Takhatajian-Babujian model) interacting...
Pinning of slidding collective charge state in a 1D attractive fermion system (1998)
Chen, Shu, Wang, Yupeng, Yang, Fan, Pu, Fu-Cho
We investigate an interacting fermion model with boundary potential by using Bethe ansatz method. The ground state properties of the system and the boundary effect are discussed. It is found that...
Comment on "The Hubbard Quantum Wire" (1998)
%auto-ignore Paper has been withdrawn by the author.
Scalar potential effect in an integrable Kondo model (1998)
To study the impurity potential effect to the Kondo problem in a Luttinger liquid, we propose an integrable model of two interacting half-chains coupled with a single magnetic impurity...
Exact solution of the open Heisenberg chain with two impurities (1998)
We propose an integrable model of the spin-1/2 Heisenberg chain coupled to two impurity moments. With the open boundary conditions at the impurity sites, the model can be exactly solved for arbitrary...
Integrabilities of the $t-J$ Model with Impurities (1998)
Hu, Zhan-Ning, Pu, Fu-Cho, Wang, Yupeng
The hamiltonian with magnetic impurities coupled to the strongly correlated electron system is constructed from $t-J$ model. And it is diagonalized exactly by using the Bethe ansatz method. Our...
Thesis (Ph. D.)--University of Memphis, 1998.
Fermi liquid features of the one-dimensional Luttinger liquid (1997)
We show that the one-dimensional (1D) electron systems can also be described by Landau's phenomenological Fermi-liquid theory. Most of the known results derived from the Luttinger-liquid theory can...
Exact Results for a Kondo Problem in One Dimensional t-J Model (1997)
Wang, Yupeng, Dai, Jianhui, Hu, Zhanning, Pu, Fu-Cho
We propose an integrable Kondo problem in a one-dimensional (1D) $t-J$ model. With the open boundary condition of the wave functions at the impurity sites, the model can be exactly solved via Bethe...
An Exactly Solvable Kondo Problem for Interacting One-Dimensional Fermions (1996)
The single impurity Kondo problem in the one-dimensional $\delta$-potential Fermi gas is exactly solved for two sets of special coupling constants via Bethe ansatz. It is found that ferromagnetic...
Thesis (Ph. D.)--University of Memphis, 1998.
Liu, Lidong, Cavanaugh, Jane E., Wang, Yupeng, Sakagami, Hiroyuki, Mao, Zixu, Xia, Zhengui
Extracellular signal-regulated kinase 5 (ERK5) is a member of the mitogen-activated protein kinase family whose biological function in the CNS has not been defined. In contrast to ERK1 and ERK2,...
Liu, Lidong, Cundiff, Paige, Abel, Glen, Wang, Yupeng, Faigle, Roland, Sakagami, Hiroyuki, ...
Multipotent cortical progenitor cells differentiate into neurons and glial cells during development; however, mechanisms governing the specification of progenitors to a neuronal fate are not well...
Liu, Lidong, Cavanaugh, Jane E., Wang, Yupeng, Sakagami, Hiroyuki, Mao, Zixu, Xia, Zhengui
Extracellular signal-regulated kinase 5 (ERK5) is a member of the mitogen-activated protein kinase family whose biological function in the CNS has not been defined. In contrast to ERK1 and ERK2,...
Regulation of the G2–M cell cycle progression by the ERK5–NFκB signaling pathway
Cude, Kelly, Wang, Yupeng, Choi, Hyun-Jung, Hsuan, Shih-Ling, Zhang, Honglai, Wang, Cun-Yu, ...
Elucidation of mechanisms regulating cell cycle progression is of fundamental importance for cell and cancer biology. Although several genes and signaling pathways are implicated in G1–S...
ERK5 MAP Kinase Regulates Neurogenin1 during Cortical Neurogenesis
Cundiff, Paige, Liu, Lidong, Wang, Yupeng, Zou, Junhui, Pan, Yung-Wei, Abel, Glen, ...
The commitment of multi-potent cortical progenitors to a neuronal fate depends on the transient induction of the basic-helix-loop-helix (bHLH) family of transcription factors including Neurogenin 1...
A Comprehensive Analysis of Gene Expression Evolution Between Humans and Mice
Wang, Yupeng, Rekaya, Romdhane
Evolutionary changes in gene expression account for most phenotypic differences between species. Advances in microarray technology have made the systematic study of gene expression evolution...