Calculates the entropy of a density matrix.
densityMatrix | Density matrix, Tensor<2> |
References closeThreshold(), syten::DenseEigensolver::DenseSymEigensolverBase< Type >::evalues, kronaa(), std::log(), std::move(), overThreshold(), and SYTEN_SMALL_THRESHOLD.
Referenced by allSiteEntropy(), syten::MPS::block_entropies(), entropyOneSite(), and entropyTwoSite().