Exact eigenstates of non-frustration-free quantum many-body systems are constructed via a local error cancellation matrix-product ansatz.
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BCS wavefunctions are constructed as many-body scars in fermionic models whose scar-subspace dynamics coincide with the BCS mean-field Hamiltonian, protecting them from thermalization.
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Exact Quantum Many-Body Scars by a generalized Matrix-Product Ansatz
Exact eigenstates of non-frustration-free quantum many-body systems are constructed via a local error cancellation matrix-product ansatz.
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Certain BCS wavefunctions are quantum many-body scars
BCS wavefunctions are constructed as many-body scars in fermionic models whose scar-subspace dynamics coincide with the BCS mean-field Hamiltonian, protecting them from thermalization.