137 citations · 865 across the 36 of their papers we have counts for
36 papers
Fluctuation-based evidence for number--phase dynamics in a frustrated orbital superfluid
Rui-Lang Zeng, Zi-Yao Zhang, Ling-Na Wu +5
Frustrated quantum matter can host intertwined orders rooted in symmetry-related low-energy landscapes, yet static order parameters alone do not reveal how fluctuations are organiz…
Observation of Brownian Motion of a Bose-Einstein Condensate
Xiao-Qiong Wang, Rui-Lang Zeng, Zi-Yao Zhang +4
We report on the experimental observation of classical Brownian motion in momentum space by a Bose-Einstein condensate (BEC) of Rubidium atoms prepared in a hexagonal optical latti…
Bosonic Weyl excitations induced by -orbital interactions in a cubic optical lattice
Guang-Quan Luo, Guan-Hua Huang, Zhi-Fang Xu
Weyl points exist in a fascinating topological state of matter with linear band crossings analogous to magnetic monopoles. Tremendous efforts have been devoted to investigate fermi…
Evidence for Quantum Stripe Ordering in a Triangular Optical Lattice
Xiao-Qiong Wang, Guang-Quan Luo, Jin-Yu Liu +5
Understanding strongly correlated quantum materials, such as high superconductors, iron-based superconductors, and twisted bilayer graphene systems, remains to be on…
Experimental realization of a high precision tunable hexagonal optical lattice
Jin-Yu Liu, Guang-Quan Luo, Xiao-Qiong Wang +2
Hexagonal optical lattices offer a tunable platform to study exotic orbital physics in solid state materials. Here, we present a versatile high-precision scheme to implement a hexa…
Intrinsic Anomalous Hall Effect in a Bosonic Chiral Superfluid
Guan-Hua Huang, Zhi-Fang Xu, Zhigang Wu
The anomalous Hall effect has had a profound influence on the understanding of many electronic topological materials but is much less studied in their bosonic counterparts. We pred…
Controlling atomic spin-mixing via multiphoton transitions in a cavity
Ming Xue, Xiangliang Li, Wenhao Ye +3
We propose to control spin-mixing dynamics in a gas of spinor atoms, via the combination of two off-resonant Raman transition pathways, enabled by a common cavity mode and a bichro…
Interaction induced topological Bogoliubov excitations in a spin-orbit coupled Bose-Einstein condensate
Guan-Hua Huang, Guang-Quan Luo, Zhigang Wu +1
We study topologically non-trivial excitations of a weakly interacting, spin-orbit coupled Bose-Einstein condensate in a two-dimensional square optical lattice, a system recently r…
Squeezing-induced Topological Gap Opening on Bosonic Bogoliubov Excitations
Liang-Liang Wan, Zixian Zhou, Zhi-Fang Xu
We investigate the role of squeezing interaction in inducing topological Bogoliubov excitations of a bosonic system. We introduce a squeezing transformation which is capable of red…
Quantum phases of two-component bosons on the Harper-Hofstadter ladder
Jian-Dong Chen, Hong-Hao Tu, Ying-Hai Wu +1
We study two-component bosons on the Harper-Hofstadter model with two legs. The synthetic magnetic fields for the two types of bosons point to either the same direction or opposite…
Topological Classification of Excitations in Quadratic Bosonic Systems
Zixian Zhou, Liang-Liang Wan, Zhi-Fang Xu
We investigate the topological classification of excitations in quadratic bosonic systems with an excitation band gap. Time-reversal, charge-conjugation, and parity symmetries in b…
Resonant Spin Exchange between Heteronuclear Atoms Assisted by Periodic Driving
Jun-Jie Chen, Zhi-Fang Xu, Li You
We propose a general scheme for inducing resonant exchange between spins or pseudo-spins of unmatched levels via periodic driving. The basic idea is illustrated for a system of two…
Bosonic Topological Excitations from the Instability of a Quadratic Band Crossing
Guang-Quan Luo, Andreas Hemmerich, Zhi-Fang Xu
We investigate the interaction-driven instability of a quadratic band crossing arising for ultracold bosonic atoms loaded into a two-dimensional optical lattice. We consider the ca…
Odd-parity topological superfluidity for fermions in a bond-centered square optical lattice
Zhi-Fang Xu, Andreas Hemmerich, W. Vincent Liu
We propose a physical scheme for the realization of two-dimensional topological odd-parity superfluidity in a spin-independent bond-centered square optical lattice based upon inter…
Harmonic trap resonance enhanced synthetic atomic spin-orbit coupling
Ling-Na Wu, Xin-Yu Luo, Zhi-Fang Xu +3
Spin-orbit coupling (SOC) plays an essential role in many exotic and interesting phenomena in condensed matter physics. In neutral-atom-based quantum simulations, synthetic SOC con…
Generating topological optical flux lattices for ultracold atoms by modulated Raman and radio-frequency couplings
Jinlong Yu, Zhi-Fang Xu, Li You
We propose a scheme to dynamically generate optical flux lattices with nontrivial band topology using amplitude-modulated Raman lasers and radio-frequency (rf) magnetic fields. By…
π-flux Dirac bosons and topological edge excitations in a bosonic chiral p-wave superfluid
Zhi-Fang Xu, Li You, Andreas Hemmerich +1
We study the topological properties of elementary excitations in a staggered Bose-Einstein condensate realized in recent orbital optical lattice experiments. The co…
Dynamical Generation of Topological Magnetic Lattices for Ultracold Atoms
Jinlong Yu, Zhi-Fang Xu, Rong Lü +1
We propose a scheme to dynamically synthesize a space-periodic effective magnetic field for neutral atoms by time-periodic magnetic field pulses. When atomic spin adiabatically fol…
Coherent spin mixing dynamics in thermal Rb spin-1 and spin-2 gases
Xiaodong He, Bing Zhu, Xiaoke Li +3
We study the non-equilibrium coherent spin mixing dynamics in ferromagnetic spin-1 and antiferromagnetic spin-2 thermal gases of ultracold Rb atoms. Long lasting spin popula…
Tunable spin-orbit coupling synthesized with a modulating gradient magnetic field
Xinyu Luo, Lingna Wu, Jiyao Chen +5
We report the observation of tunable spin-orbit coupling (SOC) for ultracold Rb atoms in hyperfine spin-1 states. Different from most earlier experiments where atomic SOC of…
Coherent heteronuclear spin dynamics in an ultracold spin-1 mixture
Xiaoke Li, Bing Zhu, Xiaodong He +5
We report the observation of coherent heteronuclear spin dynamics driven by inter-species spin-spin interaction in an ultracold spinor mixture, which manifests as periodical and we…
Spontaneous quantum Hall effect in an atomic spinor Bose-Fermi mixture
Zhi-Fang Xu, Xiaopeng Li, Peter Zoller +1
We study a mixture of spin- bosonic and spin- fermionic cold atoms, e.g., Rb and Li, confined in a triangular optical lattice. With fermions at filling,…
Atomic spin-orbit coupling synthesized with magnetic-field-gradient pulses
Zhi-Fang Xu, Li You, Masahito Ueda
We discuss a general scheme for creating atomic spin-orbit coupling (SOC) such as the Rashba or Dresselhaus types using magnetic-field-gradient pulses. In contrast to conventional…
Gauge-spin-space rotation invariant vortices in spin-orbit coupled Bose-Einstein condensates
Zhi-Fang Xu, Shingo Kobayashi, Masahito Ueda
We revisit ground states of spinor Bose-Einstein condensates with a Rashba spin-orbit coupling, and find that votices show up as a direct consequence of spontaneous symmetry breaki…