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Quantum Up-Conversion of Squeezed Vacuum States from 1550 to 532 nm

Christina E. Vollmer, Christoph Baune, Aiko Samblowski, Tobias Eberle, Vitus Händchen, Jaromír Fiurášek, Roman Schnabel
2014 Physical Review Letters  

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Squeezed vacuum states constitute a particularly useful resource in quantum information as well as in quantum metrology. The frequency conversion of these states is important to provide the bridge between different wavelengths within a sequence of downstream applications and also to provide a way for squeezed-state generation at so-far inaccessible wavelengths. Here we demonstrate the external quantum up-conversion of carrier-light-free squeezed vacuum states for the first time. Our result
more » ... s that nondegenerate sum-frequency generation preserves the coherences that are present between photon pairs and higher-order photon pairs of the squeezed input state.
doi:10.1103/physrevlett.112.073602 pmid:24579597 fatcat:xbfqepiznfa43k7wbcmypdxlai
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Christina E. Vollmer, Christoph Baune, Aiko Samblowski, Tobias Eberle, Vitus Händchen, Jaromír Fiurášek, Roman Schnabel. "Quantum Up-Conversion of Squeezed Vacuum States from 1550 to 532 nm." Physical Review Letters 112.7 (2014)