Quantum limit for nuclear spin polarization in semiconductor quantum dots
Mesoscale and Nanoscale Physics
2014-05-12 v2
Abstract
A recent experiment [E. A. Chekhovich et al., Phys. Rev. Lett. 104, 066804 (2010)] has demonstrated that high nuclear spin polarization can be achieved in self-assembled quantum dots by exploiting an optically forbidden transition between a heavy hole and a trion state. However, a fully polarized state is not achieved as expected from a classical rate equation. Here, we theoretically investigate this problem with the help of a quantum master equation and we demonstrate that a fully polarized state cannot be achieved due to formation of a nuclear dark state. Moreover, we show that the maximal degree of polarization depends on structural properties of the quantum dot.
Cite
@article{arxiv.1310.7819,
title = {Quantum limit for nuclear spin polarization in semiconductor quantum dots},
author = {Julia Hildmann and Eleftheria Kavousanaki and Guido Burkard and Hugo Ribeiro},
journal= {arXiv preprint arXiv:1310.7819},
year = {2014}
}
Comments
11 pages, 7 figures