Current noise spectrum of a quantum shuttle

Details Current noise spectrum of a quantum shuttle Current noise spectrum of a quantum shuttle

2004-12-16

arxiv.org/abs/cond-mat/0412425v1

Physica E 29 (2005) 411-418

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 3 figures, Contribution to FQMT04, Prague, July, 2004

Scientific paper

10.1016/j.physe.2005.05.040

We present a method for calculating the full current noise spectrum for the class of nano-electromechanical systems (NEMS) that can be described by a Markovian generalized master equation. As a specific example we apply the method to a quantum shuttle. The noise spectrum of the shuttle has peaks at integer multiples of the mechanical frequency, which is slightly renormalized. The renormalization explains a previously observed small deviation of the shuttle current compared to the expected value given by the product of the natural mechanical frequency and the electron charge. For a certain parameter range the quantum shuttle exhibits a coexistence regime, where the charges are transported by two different mechanisms: shuttling and sequential tunneling. In our previous studies we showed that characteristic features in the zero-frequency noise could be quantitatively understood as a slow switching process between the two current channels, and the present study shows that this interpretation holds also qualitatively at finite frequency.

Affiliated with

Also associated with

No associations

Rating

Current noise spectrum of a quantum shuttle 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 Current noise spectrum of a quantum shuttle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current noise spectrum of a quantum shuttle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-628293