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Journal Articles Physical Review Letters Year : 1993

Experimental realization of a quantum optical tap


We have realized a system which is able to read out information encoded on the amplitude of a laser beam without degrading the signal-to-noise ratio of the carrier. This has been implemented using the two-photon cross-phase-modulation effect of a three-level system in a sodium atomic beam located in a doubly resonant optical cavity. We have achieved an improvement by a factor of 1.35 of the overall information transer compared to any classical optical tap, where a perfect quantum duplicator would reach the ideal value of 2.
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hal-00559077 , version 1 (15-04-2016)



Jean-Philippe Poizat, Philippe Grangier. Experimental realization of a quantum optical tap. Physical Review Letters, 1993, 70, pp.271-274. ⟨10.1103/PhysRevLett.70.271⟩. ⟨hal-00559077⟩
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