Polarization-Correlated Photon Pairs from a Single Quantum Dot
Mesoscale and Nanoscale Physics
2009-11-07 v2 Quantum Physics
Abstract
Polarization correlation in a linear basis, but not entanglement, is observed between the biexciton and single-exciton photons emitted by a single InAs quantum dot in a two-photon cascade. The results are well described quantitatively by a probabilistic model that includes two decay paths for a biexciton through a non-degenerate pair of one-exciton states, with the polarization of the emitted photons depending on the decay path. The results show that spin non-degeneracy due to quantum-dot asymmetry is a significant obstacle to the realization of an entangled-photon generation device.
Cite
@article{arxiv.cond-mat/0111242,
title = {Polarization-Correlated Photon Pairs from a Single Quantum Dot},
author = {Charles Santori and David Fattal and Matthew Pelton and Glenn S. Solomon and Yoshihisa Yamamoto},
journal= {arXiv preprint arXiv:cond-mat/0111242},
year = {2009}
}
Comments
4 pages, 4 figures, revised discussion