Noiseless linear amplification and distillation of entanglement
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We introduce and experimentally demonstrate the idea of noiseless linear amplification of a harmonic oscillator. While deterministic amplification of this kind violates the quantum no-cloning theorem, nondeterministic heralded amplification is possible. We demonstrate an experimental circuit to realize this concept, and use it for a simple distillation of field entanglement. The concept has application to the distillation of continuous-variables EPR entanglement and quantum communications tasks.
Proceedings of the Australasian Conference on Optics, Lasers, and Spectroscopy and Australian Conference on Optical Fibre Technology in association with the International Workshop on Dissipative Solitons 2009
Quantum Information, Computation and Communication