Low-Noise Amplification of a Continuous-Variable Quantum State

R.C. Pooser, A.M. Marino, V. Boyer, P.D. Lett, K.M. Jones

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)


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.
Original languageEnglish
Article number010501
Pages (from-to)n/a
JournalPhysical Review Letters
Issue number1
Publication statusPublished - 29 Jun 2009


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