We present an experimental realization of a low-noise, phase-insensitive optical amplifier using a four-wave mixing interaction in hot Rb vapor. Performance near the quantum limit for a range of amplifier gains, including near unity, can be achieved. Such low-noise amplifiers are essential for so-called quantum cloning machines and are useful in quantum information protocols. We demonstrate that amplification and ``cloning'' of one half of a two-mode squeezed state is possible while preserving entanglement.
@article{arxiv.0906.5024,
title = {Low-Noise Amplification of a Continuous Variable Quantum State},
author = {R. C. Pooser and A. M. Marino and V. Boyer and K. M. Jones and P. D. Lett},
journal= {arXiv preprint arXiv:0906.5024},
year = {2015}
}
Comments
To appear in Physical Review Letters July 3rd. 4 pages, 4 figures