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Journal Article

Experimentally feasible purification of continuous-variable entanglement

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Schnabel,  Roman
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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pra050302.pdf
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Citation

Fiurasek, J., Marek, P., Filip, R., & Schnabel, R. (2007). Experimentally feasible purification of continuous-variable entanglement. Physical Review A, 75: 050302.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-49C1-2
Abstract
We propose a scheme for purification and distillation of squeezed and entangled continuous-variable states of light transmitted through a channel exhibiting phase fluctuations. The outstanding advantage of the suggested protocol is its experimental feasibility since it only involves an interference of two copies of the decohered state on a balanced beam splitter, a homodyne measurement on one of the output beams, and a conditioning on the measurement outcome. The purification can counteract the detrimental effects of phase fluctuations in optical quantum-communication networks.