TY - JOUR

T1 - Mesoscopic fluctuations in the ground state energy of disordered quantum dots

AU - Sivan, S.

AU - Berkovits, R.

AU - Aloni, Y.

AU - Prus, O.

AU - Auerbach, A.

AU - Ben-Yoseph, G.

PY - 1996

Y1 - 1996

N2 - The ground state energy of disordered quantum dots is studied experimentally as a function of dot population. The fluctuations are found to be considerably larger than those predicted by random matrix theory and to display different statistics. Exact diagonalization of the Hamiltonian pertaining to small clusters shows, indeed, that the random matrix statistics holds only for weak Coulomb interactions. As the interaction is made realistic, a crossover to a different statistics, similar to the experimental one, is observed. The statistics crossover is accompanied by appearance of short range spatial correlations in the electron density.

AB - The ground state energy of disordered quantum dots is studied experimentally as a function of dot population. The fluctuations are found to be considerably larger than those predicted by random matrix theory and to display different statistics. Exact diagonalization of the Hamiltonian pertaining to small clusters shows, indeed, that the random matrix statistics holds only for weak Coulomb interactions. As the interaction is made realistic, a crossover to a different statistics, similar to the experimental one, is observed. The statistics crossover is accompanied by appearance of short range spatial correlations in the electron density.

UR - http://www.scopus.com/inward/record.url?scp=4143141365&partnerID=8YFLogxK

U2 - 10.1103/physrevlett.77.1123

DO - 10.1103/physrevlett.77.1123

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SN - 0031-9007

VL - 77

SP - 1123

EP - 1126

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

ER -