Witness thresholds for the stellar rank of light states can be computed by maximizing a single finite-dimensional eigenvalue over Gaussian unitary parameters, with the optimization dimension independent of the rank.
Quantum non-Gaussianity of light and atoms,
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Efficient construction of witnesses of stellar rank of nonclassical states of light
Witness thresholds for the stellar rank of light states can be computed by maximizing a single finite-dimensional eigenvalue over Gaussian unitary parameters, with the optimization dimension independent of the rank.