Derives path-product expansion for free-fermion modes and local conserved charges in generalized free-fermion models from Krylov basis generating function.
TheS= 1 2 XY and XYZ models on the two or higher dimensional hypercubic lattice do not possess nontrivial local conserved quantities.Ann
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Solving models with generalized free fermions II: Path-product expansion and conserved charges
Derives path-product expansion for free-fermion modes and local conserved charges in generalized free-fermion models from Krylov basis generating function.