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60 papers · 1 filter
Engineering Hubbard models with gated two-dimensional moiré systems
Yiqi Yang, Yubo Yang, Miguel A. Morales +1
Lattice models are powerful tools for studying strongly correlated quantum many-body systems, but their general lack of exact solutions motivates efforts to simulate them in tunabl…
Investigating the Fermi-Hubbard model by the tensor-backflow method
Xiao Liang
We apply the Tensor-Backflow method to investigate the Fermi-Hubbard model on two-dimensional lattices up to 256 sites, exploring various interaction strengths , electron fillin…
The two-dimensional homogeneous electron gas with symmetric dual-gate screening: exchange-correlation functional and other ground-state properties
Yiqi Yang, Yubo Yang, Kun Chen +2
The two-dimensional (2D) homogeneous electron gas (HEG) is a fundamental model in quantum many-body physics. It is important to theoretical and computational studies, where exchang…
Correlation effects in magic-angle twisted bilayer graphene: An auxiliary-field quantum Monte Carlo study
Zhi-Yu Xiao, Shiwei Zhang
Magic angle twisted bilayer graphene (MATBG) presents a fascinating platform for investigating the effects of electron interactions in topological flat bands. The Bistritzer-MacDon…
Crossover from Integer to Fractional Quantum Hall Effect
Koji Kudo, Jonathan Schirmer, Jainendra K. Jain
The parton theory constructs candidate fractional quantum Hall states by decomposing the physical particles into unphysical partons, placing the partons in integer quantum Hall sta…
Downfolding from Ab Initio to Interacting Model Hamiltonians: Comprehensive Analysis and Benchmarking of the DFT+cRPA Approach
Yueqing Chang, Erik G. C. P. van Loon, Brandon Eskridge +8
Model Hamiltonians are regularly derived from first-principles data to describe correlated matter. However, the standard methods for this contain a number of largely unexplored app…