We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear optical tools only. By means of a suitable multiphoton detection technique, erasing Welcher-Weg information, our proposed scheme allows the generation and measurement of an important class of entangled multiqubit states.
@article{arxiv.quant-ph/0703137,
title = {Generation of Symmetric Dicke States of Remote Qubits with Linear Optics},
author = {C. Thiel and J. von Zanthier and T. Bastin and E. Solano and G. S. Agarwal},
journal= {arXiv preprint arXiv:quant-ph/0703137},
year = {2007}
}
Comments
New version, a few modifications and a new figure, accepted in Physical Review Letters