Decoherence-Assisted Single Electron Trapping at Room Temperature

Details Decoherence-Assisted Single Electron Trapping at Room Temperature Decoherence-Assisted Single Electron Trapping at Room Temperature

2011-04-23

arxiv.org/abs/1104.4553v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revtex 4, 4 pages, 5 figures

Scientific paper

We consider the problem of single-electron tunneling through a nanowire (NW) made of a semiconductor quantum dot heterostructure at room temperature. We show that by applying a bias voltage across five quantum dots (QDs) and a gate voltage to the central QD to tune it in and out of resonance with respect to the other QDs it is possible to take advantage of a subtle combination of resonant tunneling, Coulomb blockade, Pauli exclusion principle, and decoherence effects to trap a single electron inside the central QD at room temperature. For calculating the decoherence-assisted quantum dynamics through the NW, we make use of a generalized master equation based on a Hamiltonian describing the tunneling of the electron among the QDs in the tight-binding approximation. We demonstrate that the decoherence, which is in the pico-second regime, is essential to trap the electron in the central QD with probability of 70% in 1 ps at room temperature. Our results can be used for future high-temperature single-photon sources (SPS) and single-electron transistors (SET).

Affiliated with

Also associated with

No associations

Rating

Decoherence-Assisted Single Electron Trapping at Room Temperature 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 Decoherence-Assisted Single Electron Trapping at Room Temperature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decoherence-Assisted Single Electron Trapping at Room Temperature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-484223