Backaction of a charge detector on a double quantum dot

Details Backaction of a charge detector on a double quantum dot Backaction of a charge detector on a double quantum dot

2009-10-27

arxiv.org/abs/0910.5052v3

Phys. Rev. B 81, 075301 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures

Scientific paper

We develop a master equation approach to study the backaction of quantum point contact (QPC) on a double quantum dot (DQD) at zero bias voltage. We reveal why electrons can pass through the zero-bias DQD only when the bias voltage across the QPC exceeds a threshold value determined by the eigenstate energy difference of the DQD. This derived excitation condition agrees well with experiments on QPC-induced inelastic electron tunneling through a DQD [S. Gustavsson et al., Phys. Rev. Lett. 99, 206804(2007)]. Moreover, we propose a new scheme to generate a pure spin current by the QPC in the absence of a charge current.

Affiliated with

Also associated with

No associations

Rating

Backaction of a charge detector on a double 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 Backaction of a charge detector on a double quantum dot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backaction of a charge detector on a double quantum dot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-482210