Coherent charge qubits based on GaAs quantum dots with a built-in barrier Abstract. We investigated the use of quantum bits (qubits)�semiconductor quantum dots containing one electron and each consisting of two tunnel-connected parts�as basic elements of the quantum computer. The numerical solution of a Schr�odinger equation taking account of the Coulomb field of adjacent electrons shows that in such structures the realization of a full set of basic logic operations, which are necessary for fulfillment of quantum computations, is possible. Durations of one- and two-qubit operations versus qubit geometry are obtained. Decoherence rates due to spontaneous emission of phonons and acoustic phonons (both piezoelectric and deformation) are evaluated. Analysis of these rates shows the proposed qubit to be coherent enough to work for an unlimited time. 1. Introduction Within the last decade large progress has been achieved in the theory of quantum computing. Unfortunately the experimental realization of practically valuable quantum computers has not been performed, mainly d......

Word Count: 2436
Page Count: 9.7 (250 words a page / double spaced)

What is Your Time Worth? Get INSTANT UNLIMITED ACCESS to this Essay
and 15,000 other Essays & Term Papers . Only $12.99!

View This Essay Now

Get instant access to this essay paper and 15,000 term papers, essays, and book reports for only $12.99!
If you wish to view the free essay of NANOTECH, you must donate an original essay to our web site so that we can grow our collection of free essays, book reports and term papers. Click to donate and then view the entire NANOTECH essay, term paper or book report for FREE.

Search for other NANOTECH essays, term papers and book reports.

Other Free Essays, Term Papers and Book Reports:

Lost and Found in Walden free book report
galaxy collision free essay paper
The Role Of Women (macbeth) free term paper
The Perfect Day free essay paper
What is Astronomy? free book report
The 1995 Quebec Referendum free term paper
Death and Transfiguration free term paper
Drug Abuse in the United States free term paper
how children acquire language free essay paper
The Tragedies of Shakespeare free term paper
1837 rebellion free term paper
Industrialiation free book report
Hamlets Revenge free book report
Modern Hamlet free term paper
How does Arthur Miller turn a family argument into an exciting, dramatic, and theatrical event? free essay paper
The Most Dangerous Game free essay paper
martin luther king free book report
KPA of Ender's Shadow free term paper
A Few Words on Social Classes free term paper
The Unknown Jesus (One Flew Over The Cuckoos Nest) by Ken Kesey free term paper

We realize you have a choice when selecting where to go to find a book report, essay or term paper on NANOTECH so we appreciate your support in using our essay help and term paper help service.

Dear Free Essays:

Thanks for helping me with my term paper!
With so many essays and term papers on your service, I got a few ideas from mixing and matching and managed to write a great paper in 1/10 the time. My teacher thought so too because I got an A grade. Thank you so much!

Julia B.
Denver, Colorado

I'm very pleased with the quality of your term papers and essays. For all the time and worrying your service saved me from, it was well worth the $12.99.

Brandon W.
Columbus, Ohio

I totally waited to the last minute to work on my term paper and really started to freak. But your site totally came to my rescue and helped me out of a bind. I scored an 94 and was very pleased. Thank you!

Greg F.
UC San Diego