000060839 001__ 60839 000060839 005__ 20170504084920.0 000060839 0247_ $$2doi$$a10.1103/PhysRevA.86.022525 000060839 0248_ $$2sideral$$a78892 000060839 037__ $$aART-2012-78892 000060839 041__ $$aeng 000060839 100__ $$0(orcid)0000-0002-6515-3601$$aBenavides-Riveros, C. 000060839 245__ $$aLowest excited configuration of harmonium 000060839 260__ $$c2012 000060839 5060_ $$aAccess copy available to the general public$$fUnrestricted 000060839 5203_ $$aThe harmonium model has long been regarded as an exactly solvable laboratory bench for quantum chemistry [W. Heisenberg, Z. Phys. 38, 411 (1926)]. For studying correlation energy, only the ground state of the system has received consideration heretofore. This is a spin singlet state. In this work we exhaustively study the lowest excited (spin triplet) harmonium state, with the main purpose of revisiting the relation between entanglement measures and correlation energy for this quite different species. The task is made easier by working with Wigner quasiprobabilities on phase space. 000060839 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/FPA2009-09638 000060839 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000060839 590__ $$a3.042$$b2012 000060839 591__ $$aOPTICS$$b7 / 79 = 0.089$$c2012$$dQ1$$eT1 000060839 591__ $$aPHYSICS, ATOMIC, MOLECULAR & CHEMICAL$$b9 / 34 = 0.265$$c2012$$dQ2$$eT1 000060839 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000060839 700__ $$0(orcid)0000-0002-8036-4589$$aGracia-Bondía, J.M.$$uUniversidad de Zaragoza 000060839 700__ $$aVárilly, J.C. 000060839 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDepartamento de Física Teórica$$cFísica Teórica 000060839 773__ $$g86, 2 (2012), 022525 [12 pp]$$pPhys. rev., A$$tPHYSICAL REVIEW A$$x1050-2947 000060839 8564_ $$s564382$$uhttps://zaguan.unizar.es/record/60839/files/texto_completo.pdf$$yVersión publicada 000060839 8564_ $$s106226$$uhttps://zaguan.unizar.es/record/60839/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000060839 909CO $$ooai:zaguan.unizar.es:60839$$particulos$$pdriver 000060839 951__ $$a2017-05-04-08:44:44 000060839 980__ $$aARTICLE