{
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      "reference": "[code](https://github.com/varbench/methods/blob/main/programs/dmrg_itensors_hubbard/square_64_PO_32_8.jl)",
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      "reference": "[paper](https://journals.aps.org/prb/abstract/10.1103/PhysRevB.107.115133)",
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      "reference": "[paper](https://journals.aps.org/pra/abstract/10.1103/PhysRevA.92.033603) [code](https://github.com/varbench/methods/blob/main/scripts/Hubbard/square_64_PO_32_8/AFQMC/)",
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}