Constructs two-impurity wave functions to derive rigorous weak-coupling polaron interactions depending on statistics and medium constraints, plus an exact relation between fixed-density and fixed-chemical-potential cases valid for arbitrary coupling.
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Extended nearest-neighbor interactions in 2D lattice polarons generate dark impurity states with nontrivial internal structure beyond the usual attractive and repulsive branches.
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Role of impurity statistics and medium constraints in polaron-polaron interactions
Constructs two-impurity wave functions to derive rigorous weak-coupling polaron interactions depending on statistics and medium constraints, plus an exact relation between fixed-density and fixed-chemical-potential cases valid for arbitrary coupling.
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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.