Entanglement amplifier: Passive and active schemes
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In this paper, we discuss the theory of entanglement amplifiers. We first describe non-degenerate optical parametric oscillator as an entanglement amplifier and present an input-output calculation for the entanglement of the output fields. We show that two bright output entanglement beams can be produced from this system. We then show that a correlated spontaneous emission laser can be used to implement an entanglement amplifier.
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Fluctuations and Noise in Photonics and Quantum Optics III