Distillation of the two-mode squeezed state

We experimentally demonstrate entanglement distillation of the two-mode squeezed state obtained by parametric down-conversion. Applying the photon annihilation operator to both modes, we raise the fraction of the photon-pair component in the state, resulting in the increase of both squeezing and ent...

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Bibliographic Details
Published in:Physical review letters 2014-02, Vol.112 (7), p.070402-070402, Article 070402
Main Authors: Kurochkin, Yury, Prasad, Adarsh S, Lvovsky, A I
Format: Article
Language:English
Subjects:
Compressing
Distillation
Entanglement
Gaussian
Operators
Photons
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Summary:We experimentally demonstrate entanglement distillation of the two-mode squeezed state obtained by parametric down-conversion. Applying the photon annihilation operator to both modes, we raise the fraction of the photon-pair component in the state, resulting in the increase of both squeezing and entanglement by about 50%. Because of the low amount of initial squeezing, the distilled state does not experience significant loss of Gaussian character.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.112.070402