Emperador, AgustíPi Pericay, MartíBarranco Gómez, ManuelLipparini, EnricoSerra, Llorenç2009-12-232009-12-2319980163-1829https://hdl.handle.net/2445/10463We have investigated edge modes of different multipolarity sustained by quantum antidots at zero magnetic field. The ground state of the antidot is described within a local-density-functional formalism. Two sum rules, which are exact within this formalism, have been derived and used to evaluate the energy of edge collective modes as a function of the surface density and the size of the antidot.4 p.application/pdfeng(c) The American Physical Society, 1998Superfícies (Física)Propietats elèctriquesPropietats òptiquesSurfaces (Physics)Electric propertiesOptical propertiesinfo:eu-repo/semantics/article134355info:eu-repo/semantics/openAccess