We report the experimental realization and characterization of one 60-mode copy, and of two 30-mode copies, of a dual-rail quantum-wire cluster state in the quantum optical frequency comb of a bimodally pumped optical parametric oscillator. This is the largest entangled system ever created whose subsystems are all available simultaneously. The entanglement proceeds from the coherent concatenation of a multitude of EPR pairs by a single beam splitter, a procedure which is also a building block for the realization of hypercubic-lattice cluster states for universal quantum computing.
@article{arxiv.1311.2957,
title = {Experimental realization of multipartite entanglement of 60 modes of a quantum optical frequency comb},
author = {Moran Chen and Nicolas C. Menicucci and Olivier Pfister},
journal= {arXiv preprint arXiv:1311.2957},
year = {2014}
}
Comments
Accepted by PRL. 5 pages, 5 figures + 14 pages, 9 figures of supplemental material. Ver3: better experimental data