Realization of the Optimal Universal Quantum Entangler
arXiv:quant-ph/0410224 · doi:10.1103/PhysRevA.70.062313
Abstract
We present the first experimental demonstration of the ''optimal'' and ''universal'' quantum entangling process involving qubits encoded in the polarization of single photons. The structure of the ''quantum entangling machine'' consists of the quantum injected optical parametric amplifier by which the contextual realization of the 1->2 universal quantum cloning and of the universal NOT (U-NOT) gate has also been achieved.
10 pages, 3 figures, to appear in Physical Review A