Detection of Single Spin Decoherence in a Quantum Dot via Charge Currents
Mesoscale and Nanoscale Physics
2016-08-31 v1
Abstract
We consider a quantum dot attached to leads in the Coulomb blockade regime which has a spin 1/2 ground state. We show that by applying an ESR field to the dot-spin the stationary current in the sequential tunneling regime exhibits a resonance whose line width is determined by the single-spin decoherence time T_2. The Rabi oscillations of the dot-spin are shown to induce coherent current oscillations from which T_2 can be deduced in the time domain. We describe a spin-inverter which can be used to pump current through a double-dot via spin flips generated by ESR.
Cite
@article{arxiv.cond-mat/0011193,
title = {Detection of Single Spin Decoherence in a Quantum Dot via Charge Currents},
author = {Hans-Andreas Engel and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0011193},
year = {2016}
}
Comments
4 pages, 3 figures