Non-classical properties of quantum amplifiers
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This paper considers the physical properties of amplifier systems based on Rigged Reservoirs. The properties required to obtain stationary behaviour with anomalous reservoir correlation functions is reviewed. It is shown that these are the origin of different amplifier-added noise in the two quadrature components of the output. Time reversal invariance enforces an equal gain for the two components. The cloning limit for a squeezed output is discussed. To prove the existence of systems with the desired properties, we display two realizations in terms of squeezed reservoirs.
KeywordsThin Film Correlation Function Time Reversal Stationary Behaviour Quadrature Component
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