Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1998-07-31
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 3 figures all in gzipped tarred file
Scientific paper
10.1209/epl/i1998-00539-0
The fluctuations in the spacing of the tunneling resonances through a quantum dot have been studied in the quantum Hall regime. Using the fact that the ground-state of the system is described very well by the Laughlin wavefunction, we were able to determine accurately, via classical Monte Carlo calculations, the amplitude and distribution of the peak-spacing fluctuations. Our results clearly demonstrate a big enhancement of the fluctuations as the importance of the electronic correlations increases, namely as the density decreases and filling factor becomes smaller. We also find that the distribution of the fluctuations approaches a Gaussian with increasing density of random potentials.
Meir Yigal
Shopen Elad
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