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Solving models with generalized free fermions II: Path-product expansion and conserved charges
Kohei Fukai, Balázs Pozsgay, István Vona
Free-fermion solvability in quantum spin systems is increasingly understood to be governed by a graph Clifford algebra defined from the frustration graph of the Hamiltonian. When t…
Dissipative free fermions in disguise
Kohei Fukai, Hironobu Yoshida, Hosho Katsura
Recently, a class of spin chains known as ``free fermions in disguise'' (FFD) has been discovered, which possess hidden free-fermion spectra even though they are not solvable via t…
Solving models with generalized free fermions I: Algebras and eigenstates
Kohei Fukai, Balázs Pozsgay, István Vona
We study quantum spin chains solvable via hidden free fermionic structures. We study the algebras behind such models, establishing connections to the mathematical literature of the…