Quantum-Dot Cellular Automata using Buried Dopants

Details Quantum-Dot Cellular Automata using Buried Dopants Quantum-Dot Cellular Automata using Buried Dopants

2004-07-26

arxiv.org/abs/cond-mat/0407658v2

Phys. Rev. B 71, 115302 (2005) (10 pages)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Minor changes in response to referees comments. Improved section on scaling and added plot of incoherent switching times

Scientific paper

10.1103/PhysRevB.71.115302

The use of buried dopants to construct quantum-dot cellular automata is investigated as an alternative to conventional electronic devices for information transport and elementary computation. This provides a limit in terms of miniaturisation for this type of system as each potential well is formed by a single dopant atom. As an example, phosphorous donors in silicon are found to have good energy level separation with incoherent switching times of the order of microseconds. However, we also illustrate the possibility of ultra-fast quantum coherent switching via adiabatic evolution. The switching speeds are numerically calculated and found to be 10's of picoseconds or less for a single cell. The effect of decoherence is also simulated in the form of a dephasing process and limits are estimated for operation with finite dephasing. The advantages and limitations of this scheme over the more conventional quantum-dot based scheme are discussed. The use of a buried donor cellular automata system is also discussed as an architecture for testing several aspects of buried donor based quantum computing schemes.

Affiliated with

Also associated with

No associations

Rating

Quantum-Dot Cellular Automata using Buried Dopants 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 Quantum-Dot Cellular Automata using Buried Dopants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum-Dot Cellular Automata using Buried Dopants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-86621