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Accurate Simulation of the Hubbard Model with Finite Fermionic Projected Entangled Pair States

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arxiv 2502.13454 v2 pith:A4WH7QIL submitted 2025-02-19 cond-mat.str-el cond-mat.supr-conquant-ph

classification cond-mat.str-elcond-mat.supr-conquant-ph
keywords fermionichubbardmodeltimesaccurateentangledfinite-sizepair
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We demonstrate the use of finite-size fermionic projected entangled pair states, in conjunction with variational Monte Carlo, to perform accurate simulations of the ground-state of the 2D Hubbard model. Using bond dimensions of up to $D=28$, we show that we can surpass state-of-the-art DMRG energies that use up to $m=32000$ SU(2) multiplets on 8-leg ladders. We further apply our methodology to $10\times 16$, $12\times 16$ and $16 \times 16$ lattices at $1/8$ hole doping and observe the dimensional crossover between stripe orientations. Our work shows the power of finite-size fermionic tensor networks to resolve the physics of the 2D Hubbard model and related problems.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Comparing Symmetrized Determinant Neural Quantum States for the Hubbard Model

    cond-mat.str-el 2025-10 conditional novelty 6.0 of 10

    For the doped square-lattice Hubbard model, hidden-fermion and backflow neural quantum states with a Vision Transformer backbone reach nearly equal variational energies; translation-equivariant attention is outperform...

  2. Neuralized Fermionic Tensor Networks for Quantum Many-Body Systems

    cond-mat.dis-nn 2025-06 unverdicted novelty 6.0 of 10

    NN-fTNS enhance fermionic tensor networks with neural parametrization to improve expressivity and achieve order-of-magnitude better energies than pure fTNS on Hubbard models while maintaining linear scaling.

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