Collective properties of electrons and holes in coupled quantum dots
  We discuss the properties of few electrons and electron-hole pairs confined in coupled semiconductor quantum dots, with emphasis on correlation effects and the role of tunneling. We shall discuss, in particular, exact diagonalization results for biexciton binding energy, electron-hole localization, magnetic-field induced Wigner molecules, and spin ordering. 
Guido Goldoni, Filippo Troiani, Massimo Rontani, Devis Bellucci, Elisa   Molinari, Ulrich Hohenester