Physics – Condensed Matter
Scientific paper
1994-06-10
Physics
Condensed Matter
13 pages, RevTeX 3, six uuencoded postscript figures, CMT-ERM-9402
Scientific paper
10.1103/PhysRevB.51.1714
We study the statistics of level widths of a quantum dot with extended contacts in the absence of time-reversal symmetry. The widths are determined by the amplitude of the wavefunction averaged over the contact area. The distribution function of level widths for a two-point contact is evaluated exactly. The distribution resembles closely the result obtained when the wavefunction fluctuates independently at each point, but differs from the one-point case. Analytical calculations and numerical simulations show that the distribution for many-point contacts has a power-law behavior at small level widths. The exponent is given by the number of points in the lead and diverges in the continuous limit. The distribution of level widths is used to determine the distribution of conductance peaks in the resonance regime. At intermediate temperatures, we find that the distribution tends to normal and fluctuations in the height of the peaks are suppressed as the lead size is increased.
Altshuler Boris L.
Mucciolo Eduardo R.
Prigodin Vladimir N.
No associations
LandOfFree
Statistical Properties of Level Widths and Conductance Peaks in a Quantum Dot does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Statistical Properties of Level Widths and Conductance Peaks in a Quantum Dot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistical Properties of Level Widths and Conductance Peaks in a Quantum Dot will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-41484