Entanglement distillation from Gaussian input states

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Gaussian quantum information (2011, methodology): “…Gaussian LOCC operations (Eisert, Scheel, and Plenio, 2002; Fiuràšek, 2002a;Giedke andCirac, 2002), but canbe achieved using nonGaussian operations that map Gaussian states into Gaussian states (Browne et al., 2003), as recently demonstrated by Takahashi et al. (2010) and Xiang et al. (2010).”
Hybrid discrete- and continuous-variable quantum information (2014, methodology): “Experiments were already performed, showing such photon subtraction-based distillation [116, 117].”
Heralded noiseless linear amplification and distillation of entanglement (2009, background): “The process of photon subtraction can increase field entanglement but at the price of producing a non-Gaussian output stat”
5. Squeezed Light (2014, unknown): “The unsolved challenges in this domain are long-term storage of squeezed light [79–81] as well as methods of distilling the two-mode squeezed state that has experienced losses [82, 83].”