Fractionalization into merons in quantum dots.
We study by exact diagonalization, in the lowest Landau level approximation, the Coulomb interaction problem of N=4 and N=6 quantum dots in the limit of zero Zeeman coupling. We find that meron excitations constitute the lowest lying states of the quantum dots. This is based on a mapping between the excitations of the dot and states of the Haldane-Shastry spin chain.
Petković
A
A
Institute of Physics, P.O. Box 68, 11080 Belgrade, Serbia and Institut für Theoretische Physik, Universität zu Köln, 50937 Köln, Germany.
Milovanović
M V
MV