Extended nearest-neighbor interactions in 2D lattice polarons generate dark impurity states with nontrivial internal structure beyond the usual attractive and repulsive branches.
Zhang, The fate of a single impurity in the bose-hubbard model, arXiv preprint arXiv:2601.11058 (2026)
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Lattice polarons with extended interactions
Extended nearest-neighbor interactions in 2D lattice polarons generate dark impurity states with nontrivial internal structure beyond the usual attractive and repulsive branches.