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Experimentally feasible quantum erasure-correcting code for continuous variables
J. Niset, U. L. Andersen, N. J. Cerf
We devise a scheme that protects quantum coherent states of light from probabilistic losses, thus achieving the first continuous-variable quantum erasure-correcting code. If the oc…
Raman-induced limits to efficient squeezing in optical fibers
Ruifang Dong, Joel Heersink, Joel F. Corney +3
We report new experiments on polarization squeezing using ultrashort photonic pulses in a single pass of a birefringent fiber. We measure what is to our knowledge a record squeezin…
An efficient source of continuous variable polarisation entanglement
Ruifang Dong, Joel Heersink, Jun-ichi Yoshikawa +3
We have experimentally demonstrated the efficient creation of highly entangled bipartite continuous variable polarisation states. Exploiting an optimised scheme for the production…
Non-unity gain minimal disturbance measurement
Metin Sabuncu, Ladislav Mišta, Jaromír Fiurášek +3
We propose and experimentally demonstrate an optimal non-unity gain Gaussian scheme for partial measurement of an unknown coherent state that causes minimal disturbance of the stat…
Quantum Filtering of Optical Coherent States
C. Wittmann, D. Elser, U. L. Andersen +3
We propose and experimentally demonstrate non-destructive and noiseless removal (filtering) of vacuum states from an arbitrary set of coherent states of continuous variable systems…
Experimental Demonstration of Macroscopic Quantum Coherence in Gaussian States
Christoph Marquardt, Ulrik L. Andersen, Gerd Leuchs +4
We witness experimentally the presence of macroscopic coherence in Gaussian quantum states using a recently proposed criterion (E.G. Cavalcanti and M. Reid, Phys. Rev. Lett. 97, 17…
Demonstration of deterministic and high fidelity squeezing of quantum information
Jun-ichi Yoshikawa, Toshiki Hayashi, Takayuki Akiyama +4
By employing at recent proposal (R. Filip, P. Marek and U.L. Andersen, Phys. Rev. A {\bf 71}, 042308 (2005) \cite{Filip05.pra}), we experimentally demonstrate a universal, determin…
Quantum reconstruction of an intense polarization squeezed optical state
Ch. Marquardt, J. Heersink, R. Dong +5
We perform a reconstruction of the polarization sector of the density matrix of an intense polarization squeezed beam starting from a complete set of Stokes measurements. By using…