Abstract
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 language | English |
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Article number | 010501 |
Pages (from-to) | n/a |
Journal | Physical Review Letters |
Volume | 103 |
Issue number | 1 |
DOIs | |
Publication status | Published - 29 Jun 2009 |