Quantum up-conversion of squeezed vacuum states from 1550 to 532 nm

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 fo...

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Bibliographic Details
Published in:Physical review letters 2014-02, Vol.112 (7), p.073602-073602, Article 073602
Main Authors: Vollmer, Christina E, Baune, Christoph, Samblowski, Aiko, Eberle, Tobias, Händchen, Vitus, Fiurášek, Jaromír, Schnabel, Roman
Format: Article
Language:English
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Summary: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 proves that nondegenerate sum-frequency generation preserves the coherences that are present between photon pairs and higher-order photon pairs of the squeezed input state.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.112.073602