Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach

Details Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach

2009-11-12

arxiv.org/abs/0911.2337v1

NANO: Brief Reports and Reviews, Vol. 5, No. 4 (2010) 237-244

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 5 figures

Scientific paper

10.1142/S1793292010002153

We study electron transport through a quantum interferometer with side-coupled quantum dots. The interferometer, threaded by a magnetic flux $\phi$, is attached symmetrically to two semi-infinite one-dimensional metallic electrodes. The calculations are based on the tight-binding model and the Green's function method, which numerically compute the conductance-energy and current-voltage characteristics. Our results predict that under certain conditions this particular geometry exhibits anti-resonant states. These states are specific to the interferometric nature of the scattering and do not occur in conventional one-dimensional scattering problems of potential barriers. Most importantly we show that, such a simple geometric model can also be used as a classical XOR gate, where the two gate voltages, viz, $V_a$ and $V_b$, are applied, respectively, in the two dots those are treated as the two inputs of the XOR gate. For $\phi=\phi_0/2$ ($\phi_0=ch/e$, the elementary flux-quantum), a high output current (1) (in the logical sense) appears if one, and only one, of the inputs to the gate is high (1), while if both inputs are low (0) or both are high (1), a low output current (0) appears. It clearly demonstrates the XOR gate behavior and this aspect may be utilized in designing the electronic logic gate.

Affiliated with

Also associated with

No associations

Rating

Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach 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 Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron transport through a quantum interferometer with side-coupled quantum dots: Green's function approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-150326