For Fendley's free-fermions-in-disguise chain, post-quench GGE occupations and local energy-density expectations are derived analytically and match TEBD numerics; the quasi-particle entanglement-growth formula is only approximately correct.
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A subclass of Goldilocks QCA including the experimentally implemented one are integrable by mapping to free fermions, with local conserved quantities computed for hardware testing.
A perturbation of two Ising chains (or interpolation between Jordan-Wigner and Fendley FFD models) yields an FFD-solvable spin chain without exponential degeneracies for generic couplings.
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Correlation and entanglement dynamics of free fermions in disguise
For Fendley's free-fermions-in-disguise chain, post-quench GGE occupations and local energy-density expectations are derived analytically and match TEBD numerics; the quasi-particle entanglement-growth formula is only approximately correct.
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Integrability of Goldilocks quantum cellular automata
A subclass of Goldilocks QCA including the experimentally implemented one are integrable by mapping to free fermions, with local conserved quantities computed for hardware testing.
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Free fermions in disguise without exponential degeneracies
A perturbation of two Ising chains (or interpolation between Jordan-Wigner and Fendley FFD models) yields an FFD-solvable spin chain without exponential degeneracies for generic couplings.