Linear response time-dependent density functional theory of the Hubbard dimer Diego J. Carrascal, Jaime Ferrer, Neepa Maitra and Kieron Burke Eur. Phys. J. B, 91 7 (2018) 142 Published online: 02 July 2018 DOI: 10.1140/epjb/e2018-90114-9