156 citations · 668 across the 23 of their papers we have counts for
6 papers · 1 filter
Dynamic Response of an Electron Gas: Towards the Exact Exchange-Correlation Kernel
James P. F. LeBlanc, Kun Chen, Kristjan Haule +2
Precise calculations of dynamics in the homogeneous electron gas (jellium model) are of fundamental importance for design and characterization of new materials. We introduce a diag…
Single-particle excitations in the uniform electron gas by diagrammatic Monte Carlo
Kristjan Haule, Kun Chen
We calculate the single-particle excitation spectrum and the Landau Fermi liquid parameters for the archetypal model of solids, the three-dimensional uniform electron gas, with the…
Quantum-to-classical correspondence in two-dimensional Heisenberg models
Tao Wang, Xiansheng Cai, Kun Chen +2
The quantum-to-classical correspondence (QCC) in spin models is a puzzling phenomenon where the static susceptibility of a quantum system agrees with its classical-system counterpa…
Spin-Ice State of the Quantum Heisenberg Antiferromagnet on the Pyrochlore Lattice
Yuan Huang, Kun Chen, Youjin Deng +2
We study the low-temperature physics of the -symmetric spin- Heisenberg antiferromagnet on a pyrochlore lattice and find fingerprint evidence for the thermal spin-ice s…
Universal Conductivity in a Two-Dimensional Superfluid-to-Insulator Quantum Critical System
Kun Chen, Longxiang Liu, Youjin Deng +2
We compute the universal conductivity of the (2+1)-dimensional XY universality class, which is realized for a superfluid-to-Mott insulator quantum phase transition at constant dens…
Deconfined criticality flow in the Heisenberg model with ring-exchange interactions
Kun Chen, Yuan Huang, Youjin Deng +3
Quantum transition points in the J -Q model---the test bed of the deconfined critical point theory---and the SU(2)-symmetric discrete noncompact CP^1 representation of the deconfin…