Universal quantum computation with electron spins in quantum dots based on superpositions of spacetime paths and Coulomb blockade
Quantum Physics
2007-05-23 v1
Abstract
Using electrostatic gates to control the electron positions, we present a new controlled-NOT gate based on quantum dots. The qubit states are chosen to be the spin states of an excess conductor electron in the quantum dot; and the main ingredients of our scheme are the superpositions of space-time paths of electrons and the effect of Coulomb blockade. All operations are performed only on individual quantum dots and are based on fundamental interactions. Without resorting to spin-spin terms or other assumed interactions, the scheme can be realized with a dedicated circuit and a necessary number of quantum dots. Gate fidelity of the quantum computation is also presented.
Keywords
Cite
@article{arxiv.quant-ph/0410150,
title = {Universal quantum computation with electron spins in quantum dots based on superpositions of spacetime paths and Coulomb blockade},
author = {Cyrus C. Y. Lin and Chopin Soo and Yin-Zhong Wu and Wei-Min Zhang},
journal= {arXiv preprint arXiv:quant-ph/0410150},
year = {2007}
}