Erratum to: Multipole-based modal analysis of gate-defined quantum dots in graphene S. Mohsen Raeis-Zadeh and Safieddin Safavi-Naeini Eur. Phys. J. B, 86 10 (2013) 444 Published online: 28 October 2013 DOI: 10.1140/epjb/e2013-40892-5