Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-07-04
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Talk presented at the International Discussion Meeting on Mesoscopic and Disordered systems, December, 2000, at IISc Bangalore
Scientific paper
10.1007/s12043-002-0004-2
We present a simple model of transmission across a metallic mesoscopic ring. In one of its arm an electron interacts with a single magnetic impurity via an exchange coupling. We show that entanglement between electron and spin impurity states leads to reduction of Aharonov-Bohm oscillations in the transmission coefficient. The spin-conductance is asymmetric in the flux reversal as opposed to the two probe electrical conductance which is symmetric. In the same model in contradiction to the naive expectation of a current magnification effect, we observe enhancement as well as the suppression of this effect depending on the system parameters. The limitations of this model to the general notion of dephasing or decoherence in quantum systems are pointed out.
Jayannavar Arun M.
No associations
LandOfFree
Effect of quantum entanglement on Aharonov-Bohm oscillations, spin-polarized transport and current magnification effect 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 Effect of quantum entanglement on Aharonov-Bohm oscillations, spin-polarized transport and current magnification effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of quantum entanglement on Aharonov-Bohm oscillations, spin-polarized transport and current magnification effect will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-410314