The lowest excited configuration of harmonium
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Publication:6232896
DOI10.1103/PHYSREVA.86.022525arXiv1205.2038MaRDI QIDQ6232896
José M. Gracia-Bondía, Carlos L. Benavides-Riveros, Joseph C. Várilly
Publication date: 9 May 2012
Abstract: The harmonium model has long been regarded as an exactly solvable laboratory bench for quantum chemistry [Heisenberg, 1926]. For studying correlation energy, only the ground state of the system has received consideration heretofore. This is a spin singlet state. In this work we exhaustively study the lowest excited (spin triplet) harmonium state, with the main purpose of revisiting the relation between entanglement measures and correlation energy for this quite different species. The task is made easier by working with Wigner quasiprobabilities on phase space.
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