Dissipative dynamics of coupled quantum dots under quantum measurement
Mesoscale and Nanoscale Physics
2009-11-11 v2 Quantum Physics
Abstract
We have studied the dissipative dynamics of a solid-state qubit with an extra electron confined to either one of two coupled quantum dots. Previous theoretical work based on Bloch-type rate equations gave an unphysical uniform occupation probability of the electron in the quantum dots even for non-identical dots. We show that this is due to neglecting higher order interactions in the analysis. By including higher order terms, we obtain expected asymmetric occupation probabilities for non-identical dots. Our work demonstrates that the high order interaction terms can lead to important qualitative impacts on the operation of the qubit.
Keywords
Cite
@article{arxiv.cond-mat/0511370,
title = {Dissipative dynamics of coupled quantum dots under quantum measurement},
author = {Shi-Hua Ouyang and Chi-Hang Lam and J. Q. You},
journal= {arXiv preprint arXiv:cond-mat/0511370},
year = {2009}
}
Comments
9 pages, 2 figures