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Showing 1 to 2 of 2 for “"N-representability"”.
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N-Representability in the Quantum Kernel Energy Method
… a density matrix is called N-representable. N-representability is imposed on the initial matrix by using the Clinton equations, which deliver a single-determinant N-representable one-body density matrix. Single-determinant N-representability is ensured by enforcing the density matrix to be a …
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Exact and variational investigations of Hubbard rings
… a difficult problem, known as the " N -representability problem", which is to assure that the trial density matrices actually come from a wave function that has the required exchange symmetry. This problem is ameliorated by imposing constraints on the variational search that eliminate …