Perfect quantum excitation energy transport via single edge perturbation in a complete networkHassan Bassereh, Vahid Salari, Farhad Shahbazi and Tapio Ala-NissilaEur. Phys. J. B, 90 6 (2017) 111DOI: https://doi.org/10.1140/epjb/e2017-80048-1