Phys. Rev. Lett. 98, 066808 (2007) [4 pages]Fractionalization into Merons in Quantum DotsReceived 26 January 2006; published 9 February 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.066808
DOI:
10.1103/PhysRevLett.98.066808
PACS:
73.43.Cd, 71.10.Pm, 73.21.La
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