Experimental Demonstration of Continuous Variable Cloning with Phase-Conjugate Inputs
Metin Sabuncu, Ulrik L. Andersen, Gerd Leuchs · Physical Review Letters · 2007
We report the first experimental demonstration of continuous variable cloning of phase-conjugate coherent states as proposed by Cerf and Iblisdir [Phys. Rev. Lett. 87, 247903 (2001)]. In contrast to this proposal, the cloning transformation is accomplished using only linear optical components, homodyne detection, and feedforward. As a result of combining phase conjugation with a joint measurement strategy, superior cloning is demonstrated with cloning fidelities reaching 89%.