A certified exact-arithmetic counterexample shows the stationary quantum mechanical bootstrap at level three is not tight in two dimensions, while eigenstate constraints seem to close the gap.
Hilbert, Math
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Stationarity is not enough: tightness of the quantum mechanical bootstrap and the copositive cone
A certified exact-arithmetic counterexample shows the stationary quantum mechanical bootstrap at level three is not tight in two dimensions, while eigenstate constraints seem to close the gap.