287 citations · 1.1k across the 31 of their papers we have counts for
31 papers
Continuous symmetry analysis and systematic identification of candidate order parameters for interacting fermion models
Cheng-Hao He, Yi-Zhuang You, Xiao Yan Xu
Symmetry plays a central role in modern physics, from classifying quantum states to characterizing phases of matter through spontaneous symmetry breaking. In interacting fermionic…
Symmetric Mass Generation in a Bilayer Honeycomb Lattice with Symmetry
Cheng-Hao He, Yi-Zhuang You, Xiao Yan Xu
A central question beyond the Landau paradigm is the non-perturbative critical theory of the symmetric mass generation (SMG) transition, where strong interactions gap Dirac fermion…
Tunable Luttinger liquid and correlated insulating states in one-dimensional moiré superlattices
Jiajun Chen, Bosai Lyu, Liguo Wang +23
Two-dimensional moiré superlattices have been extensively studied, and a variety of correlated phenomena have been observed. However, their lower-dimensional counterpart, one-dimen…
Boosting Determinant Quantum Monte Carlo with Submatrix Updates: Unveiling the Phase Diagram of the 3D Hubbard Model
Fanjie Sun, Xiao Yan Xu
Determinant Quantum Monte Carlo (DQMC) provides numerically exact solutions for strongly correlated fermionic systems but faces significant computational challenges with increasing…
Residual entropy from temperature incremental Monte Carlo method
Zenan Dai, Xiao Yan Xu
Residual entropy, which reflects the degrees of freedom in a system at absolute zero temperature, is crucial for understanding quantum and classical ground states. Despite its key…
The interplay of phase fluctuations and nodal quasiparticles: ubiquitous Fermi arcs in two-dimensional d-wave superconductors
Xu-Cheng Wang, Xiao Yan Xu, Yang Qi
We propose that the pseudogap and Fermi arcs can universally emerge due to thermal (static) phase fluctuations in the normal state of 2D nodal superconductors. By considering a min…
Delay Update in determinant quantum Monte Carlo
Fanjie Sun, Xiao Yan Xu
Determinant quantum Monte Carlo (DQMC) is a widely used unbiased numerical method for simulating strongly correlated electron systems. However, the update process in DQMC is often…
Fermionic skyrmions and bosonization for a Gross-Neveu transition
Xiao Yan Xu, Tarun Grover
We investigate a 2+1-D interacting Dirac semimetal with onsite flavor SU(2) symmetry. Topological considerations imply that the skyrmions in the flavor-symmetry-breaking phase carr…
Caution on Gross-Neveu criticality with a single Dirac cone: Violation of locality and its consequence of unexpected finite-temperature transition
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng +1
Lately there are many SLAC fermion investigations on the (2+1)D Gross-Neveu criticality of a single Dirac cone [1,2]. While the SLAC fermion construction indeed gives rise to the l…
Dirac fermions with plaquette interactions. III. SU(N) phase diagram with Gross-Neveu criticality and first-order phase transition
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng +1
Inspired by our recent works[1, 2] of SU(2) and SU(4) Dirac fermions subjected to plaquette interactions on square lattice, here we extend the large-scale quantum Monte Carlo inves…
Dirac fermions with plaquette interactions. II. SU(4) phase diagram with Gross-Neveu criticality and quantum spin liquid
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng +1
At sufficiently low temperatures, interacting electron systems tend to develop orders. Exceptions are quantum critical point (QCP) and quantum spin liquid (QSL), where fluctuations…
Dirac fermions with plaquette interactions. I. SU(2) phase diagram with Gross-Neveu and deconfined quantum criticalities
Yuan Da Liao, Xiao Yan Xu, Zi Yang Meng +1
We investigate the ground state phase diagram of an extended Hubbard model with -flux hopping term at half-filling on a square lattice, with unbiased large-scale auxiliary-field…
Fermion sign bounds theory in quantum Monte Carlo simulation
Xu Zhang, Gaopei Pan, Xiao Yan Xu +1
Sign problem in fermion quantum Monte Carlo (QMC) simulation appears to be an extremely hard problem. Traditional lore passing around for years tells people that when there is a si…
Projection of Infinite- Hubbard Model and Algebraic Sign Structure
Yunqing Ouyang, Xiao Yan Xu
We propose a projection approach to perform quantum Monte Carlo (QMC) simulation on the infinite- Hubbard model at some integer fillings where either it is sign problem free or…
Topological Superconductivity in Multifold Fermion Metals
Jason Z. S. Gao, Xue-Jian Gao, Wen-Yu He +3
Recently, multifold fermions characterized by band crossings with multifold degeneracy and Fermi surfaces with nontrivial Chern numbers have been discovered experimentally in AlPt[…
Competing nodal d-wave superconductivity and antiferromagnetism
Xiao Yan Xu, Tarun Grover
Competing unconventional superconductivity and antiferromagnetism widely exist in several strongly correlated quantum materials whose direct simulation generally suffers from fermi…
Kramers Nodal Line Metals
Ying-Ming Xie, Xue-Jian Gao, Xiao Yan Xu +4
Recently, it was pointed out that all chiral crystals with spin-orbit coupling (SOC) can be Kramers Weyl semimetals (KWSs) which possess Weyl points pinned at time-reversal invaria…
Revealing Fermionic Quantum Criticality from New Monte Carlo Techniques
Xiao Yan Xu, Zi Hong Liu, Gaopei Pan +3
This review summarizes recent developments in the study of fermionic quantum criticality, focusing on new progress in numerical methodologies, especially quantum Monte Carlo method…
Pair Density Wave in the Doped - Model with Ring Exchange on a Triangular Lattice
Xiao Yan Xu, K. T. Law, Patrick A. Lee
In our previous work [arXiv:1803.00999, Phys. Rev. Lett. 121, 046401 (2018)], we found a quantum spin liquid phase with a spinon Fermi surface in the two dimensional spin-1/2 Heise…
Itinerant Quantum Critical Point with Fermion Pockets and Hot Spots
Zi Hong Liu, Gaopei Pan, Xiao Yan Xu +2
Metallic quantum criticality is among the central theme in the understanding of correlated electronic systems, and converging results between analytical and numerical approaches ar…
Spinon Fermi surface in a cluster Mott insulator model on a triangular lattice and possible application to 1T-TaS
Wen-Yu He, Xiao Yan Xu, Gang Chen +2
1T-TaS is a cluster Mott insulator on the triangular lattice with 13 Ta atoms forming a star of David cluster as the unit cell. We derive a two dimensional XXZ spin-1/2 model w…
EMUS-QMC: Elective Momentum Ultra-Size Quantum Monte Carlo Method
Zi Hong Liu, Xiao Yan Xu, Yang Qi +2
One bottleneck of quantum Monte Carlo (QMC) simulation of strongly correlated electron systems lies at the scaling relation of computational complexity with respect to the system s…
Dynamical Generation of Topological Masses in Dirac Fermions
Yuan-Yao He, Xiao Yan Xu, Kai Sun +3
We report discovery of a topological Mott insulator in strongly-correlated Dirac semimetals. Such an interaction-driven topological state has been theoretically proposed but not ye…
Itinerant quantum critical point with frustration and non-Fermi-liquid
Zi Hong Liu, Xiao Yan Xu, Yang Qi +2
Employing the self-learning quantum Monte Carlo algorithm, we investigate the frustrated transverse-field triangle-lattice Ising model coupled to a Fermi surface. Without fermions,…