Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-05-18
Phys. Rev. B 76, 195330 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages 4 figures, submitted to prb
Scientific paper
Electron-electron interactions play a major role in determining the low-temperature rate of phase loss of electrons in mesoscopic systems. The study of the dephasing rate is expected to contribute to the understanding of the many-body nature of such systems. Closed quantum dots are of special interest in this respect, due to theoretical predictions suggesting a possible transition temperature below which the dephasing rate vanishes. This prediction has attracted much attention, since closed quantum dots are prime candidates for storage units in quantum computers, and thus their phase coherence properties are of great importance. However, an effective method for measuring the dephasing rate within a closed quantum dot is still lacking. Here we study two-level systems and show that the Fano factor has a sharp peak as a function of the chemical potential, the location of which can be simply related to the dephasing rate. We thus suggest to use the properties of the Fano factor peak in the super-Poissonian regime as a probe for the dephasing rate.
Eisenberg Eli
Fleurov Daria
No associations
LandOfFree
Super-Poissonian Shot Noise as a Measure of Dephasing in Closed Quantum Dots 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 Super-Poissonian Shot Noise as a Measure of Dephasing in Closed Quantum Dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Super-Poissonian Shot Noise as a Measure of Dephasing in Closed Quantum Dots will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-439000