D. He

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20232025

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cond-mat.str-el2025

Hilbert Space Fragmentation in Hardcore Bose and Fermi Hubbard Models on Generalized Lieb Lattices

D. K. He, Z. Song

We study the Hilbert space fragmentation (HSF) in hardcore Bose and Fermi Hubbard models in the framework of the restricted spectrum generating algebra (RSGA). We present a family…

cond-mat.str-el2025★ 2 cited

$η$ -pairing states in the Hubbard model with non-uniform Hubbard interaction

D. K. He, Z. Song

The existence of $η$ -pairing eigenstates in the fermionic Hubbard model is fundamentally rooted in the $η$ -pairing symmetry, which may hold for systems with non-uniform Hubbard int…

cond-mat.str-el2023

Real-space decomposition of $p$ -wave Kitaev chain

D. K. He, E. S. Ma, Z. Song

We propose an extended Bogoliubov transformation in real space for spinless fermions, based on which a class of Kitaev chains of length $2 N$ with zero chemical potential can be map…

Hilbert Space Fragmentation in Hardcore Bose and Fermi Hubbard Models on Generalized Lieb Lattices

η-pairing states in the Hubbard model with non-uniform Hubbard interaction

Real-space decomposition of p-wave Kitaev chain

$η$ -pairing states in the Hubbard model with non-uniform Hubbard interaction

Real-space decomposition of $p$ -wave Kitaev chain