Adiabatic steering and determination of dephasing rates in double dot qubits
Mesoscale and Nanoscale Physics
2009-11-07 v1 Quantum Physics
Abstract
We propose a scheme to prepare arbitrary superpositions of quantum states in double quantum--dots irradiated by coherent microwave pulses. Solving the equations of motion for the dot density matrix, we find that dephasing rates for such superpositions can be quantitatively infered from additional electron current pulses that appear due to a controllable breakdown of coherent population trapping in the dots.
Keywords
Cite
@article{arxiv.cond-mat/0104435,
title = {Adiabatic steering and determination of dephasing rates in double dot qubits},
author = {T. Brandes and F. Renzoni and R. H. Blick},
journal= {arXiv preprint arXiv:cond-mat/0104435},
year = {2009}
}
Comments
5 pages, 4 figures. To appear in Phys. Rev. B