126 citations · 1.3k across the 47 of their papers we have counts for
47 papers
Hubbard Model on Triangular Lattice: Role of Charge Fluctuations
Ji-Si Xu, Zheng Zhu, Kai Wu +1
A chiral spin liquid (CSL) phase has been recently reported in the Hubbard model on a triangular lattice at half-filling. It emerges in an intermediate coupling regime, which is sa…
XY* transition and extraordinary boundary criticality from fractional exciton condensation in quantum Hall bilayer
Ya-Hui Zhang, Zheng Zhu, Ashvin Vishwanath
XY* transitions represent one of the simplest examples of unconventional quantum criticality, in which fractionally charged excitations condense into a superfluid, and display nove…
Superconductivity in doped triangular Mott insulators: the roles of parent spin backgrounds and charge kinetic energy
Zheng Zhu, Qianqian Chen
We study the prerequisites for realizing superconductivity in doped triangular-lattice Mott insulators by considering three distinct parent spin backgrounds, i.e., an…
Weak Ergodicity Breaking in Non-Hermitian Many-body Systems
Qianqian Chen, Shuai A. Chen, Zheng Zhu
The recent discovery of persistent revivals in the Rydberg-atom quantum simulator has revealed a weakly ergodicity-breaking mechanism dubbed quantum many-body scars, which are a se…
Proposal for asymmetric photoemission and tunneling spectroscopies in quantum simulators of the triangular-lattice Fermi-Hubbard model
Shuai A. Chen, Qianqian Chen, Zheng Zhu
Recent realization of well-controlled quantum simulators of the triangular-lattice Fermi-Hubbard model, including the triangular optical lattices loaded with ultracold Fermions and…
Metal-insulator transition and intermediate phases in the kagome lattice Hubbard model
Rong-Yang Sun, Zheng Zhu
Motivated by the recent discovery of metallic kagome lattice materials, AVSb (A=K, Rb, Cs), we investigate the ground state of the half-filled kagome lattice Hubbard mo…
Fractional Fermi liquid in a generalized model
Ya-Hui Zhang, Zheng Zhu
Inspired by the recent discovery of superconductivity in the nickelate NdSrNiO, we study a generalized model to investigate the correlated phases induced by d…
Doped Mott Insulators in the Triangular Lattice Hubbard Model
Zheng Zhu, D. N. Sheng, Ashvin Vishwanath
We investigate the evolution of the Mott insulators in the triangular lattice Hubbard Model, as a function of hole doping in both the strong and intermediate coupling limits. U…
Complex Phase Diagram of Doped XXZ Ladder: Localization and Pairing
Rong-Yang Sun, Zheng Zhu, Zheng-Yu Weng
How the ground state nature can be dramatically changed by the distinct underlying spin correlation is a central issue of doped Mott insulators. The two-leg XXZ ladder provides a p…
Magnetic Field Induced Spin Liquids in S=1 Kitaev Honeycomb Model
Zheng Zhu, Zheng-Yu Weng, D. N. Sheng
We investigate the ground state properties of the spin S=1 Kitaev honeycomb model under a magnetic field based on the density matrix renormalization group (DMRG) calculation. With…
Density Wave Instability of Composite Fermi Liquid
Shao-Kai Jian, Zheng Zhu
We investigate the density-wave instability of non-Fermi liquid states by combining exact diagonalization with renormalization group analysis. At the half-filled zeroth Land…
Widely Tunable Quantum Phase Transition from Moore-Read to Composite Fermi Liquid in Bilayer Graphene
Zheng Zhu, D. N. Sheng, Inti Sodemann
We develop a proposal to realise a widely tunable and clean quantum phase transition in bilayer graphene between two paradigmatic fractionalized phases of matter: the Moore-Read fr…
Do tensor renormalization group methods work for frustrated spin systems?
Zheng Zhu, Helmut G. Katzgraber
No. To illustrate that tensor renormalization group methods are poorly suited for frustrated magnetic systems, we study the thermodynamic properties of the two-dimensional Edwards-…
Fair sampling of ground-state configurations of binary optimization problems
Zheng Zhu, Andrew J. Ochoa, Helmut G. Katzgraber
Although many efficient heuristics have been developed to solve binary optimization problems, these typically produce correlated solutions for degenerate problems. Most notably, tr…
Spin-Orbital Density Wave and a Mott Insulator in a Two-Orbital Hubbard Model on a Honeycomb Lattice
Zheng Zhu, D. N. Sheng, Liang Fu
Inspired by recent discovery of correlated insulating states in twisted bilayer graphene (TBG), we study a two-orbital Hubbard model on the honeycomb lattice with two electrons per…
Localization in a - type ladder with translational symmetry
Rong-Yang Sun, Zheng Zhu, Zheng-Yu Weng
An explicit localization of a hole is shown in a two-leg - ladder in the presence of a staggered chemical potential, which still retains a translational sy…
Exciton Condensation in Quantum Hall Bilayers at Total Filling
Zheng Zhu, Shao-Kai Jian, D. N. Sheng
We study the coupled quantum Hall bilayers each at half-filled first excited Landau levels with varying the layer distance. Based on numerical exact diagonalization on torus, we id…
Two-hole ground state wavefunction: Non-BCS pairing in a - two-leg ladder system
Shuai Chen, Zheng Zhu, Zheng-Yu Weng
Superconductivity is usually described in the framework of the Bardeen-Cooper-Schrieffer (BCS) wavefunction, which even includes the resonating-valence-bond (RVB) wavefunction prop…
Multichannel charge Kondo effect and non-Fermi liquid fixed points in conventional and topological superconductor islands
Michał Papaj, Zheng Zhu, Liang Fu
We study multiterminal Majorana and conventional superconducting islands in the vicinity of the charge degeneracy point using bosonization and numerical renormalization group. Both…
Meson formation in mixed-dimensional t-J models
Fabian Grusdt, Zheng Zhu, Tao Shi +1
Surprising properties of doped Mott insulators are at the heart of many quantum materials, including transition metal oxides and organic materials. The key to unraveling complex ph…
Hidden spin current in doped Mott antiferromagnets
Wayne Zheng, Zheng Zhu, D. N. Sheng +1
We investigate the nature of doped Mott insulators using exact diagonalization and density matrix renormalization group methods. Persistent spin currents are revealed in the ground…
Valley Stoner Instability of the Composite Fermi Sea
Zheng Zhu, D. N. Sheng, Liang Fu +1
We study two-component electrons in the lowest Landau level at total filling factor with anisotropic mass tensors and principal axes rotated by as realized in Alumi…
Robust non-Abelian spin liquid and possible intermediate phase in antiferromagnetic Kitaev model with magnetic field
Zheng Zhu, Itamar Kimchi, D. N. Sheng +1
We investigate the non-Abelian topological chiral spin liquid phase in the two-dimensional (2D) Kitaev honeycomb model subject to a magnetic field. By combining density matrix reno…
Readiness of Quantum Optimization Machines for Industrial Applications
Alejandro Perdomo-Ortiz, Alexander Feldman, Asier Ozaeta +9
There have been multiple attempts to demonstrate that quantum annealing and, in particular, quantum annealing on quantum annealing machines, has the potential to outperform current…