We address the question whether identical-particle entanglement is a useful resource for quantum information processing. We answer this question positively by reporting a scheme to create entanglement using semiconductor quantum wells. The Pauli exclusion principle forces quantum correlations between the spins of two independent fermions in the conduction band. Selective electron-hole recombination then transfers this entanglement to the polarization of emitted photons, which can subsequently be used for quantum information tasks.
@article{arxiv.quant-ph/0608141,
title = {Useful entanglement from the Pauli principle},
author = {Daniel Cavalcanti and L. M. Moreira and Franklin Matinaga and Marcelo O. Terra Cunha and Marcelo Franca Santos},
journal= {arXiv preprint arXiv:quant-ph/0608141},
year = {2007}
}
Comments
5 pages, 3 figures. V2: accepted version - text improved, 4 pages, 2 figs