Out of these states N/2 + 1 have zero momentum and interestingly all can be obtained from our MPS as follows

Degenerate multiplet We observe numerically that the zero energy eigenvalue of (12) isN/2 + 2-fold degenerate

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quant-ph · 2026-05-04 · unverdicted · novelty 7.0

Exact eigenstates of non-frustration-free quantum many-body systems are constructed via a local error cancellation matrix-product ansatz.

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Exact Quantum Many-Body Scars by a generalized Matrix-Product Ansatz quant-ph · 2026-05-04 · unverdicted · none · ref 1
Exact eigenstates of non-frustration-free quantum many-body systems are constructed via a local error cancellation matrix-product ansatz.