Experiment towards continuous-variable entanglement swapping: Highly correlated four-partite quantum state
摘要
We present a protocol for performing entanglement swapping with intense pulsed beams. In a first step, the generation of amplitude correlations between two systems that have never interacted directly is demonstrated. This is verified in direct detection with electronic modulation of the detected photocurrents. The measured correlations are better than expected from a classical reconstruction scheme. In the entanglement swapping process, a four--partite entangled state is generated. We prove experimentally that the amplitudes of the four optical modes are quantum correlated 3 dB below shot noise, which is due to the potential four--party entanglement.
引用
@article{arxiv.quant-ph/0302068,
title = {Experiment towards continuous-variable entanglement swapping: Highly correlated four-partite quantum state},
author = {Oliver Glöckl and Stefan Lorenz and Christoph Marquardt and Joel Heersink and Michel Brownnutt and Christine Silberhorn and Qing Pan and Peter van Loock and Natalia Korolkova and Gerd Leuchs},
journal= {arXiv preprint arXiv:quant-ph/0302068},
year = {2009}
}
备注
9 pages, 10 figures, update of references 9 and 10; minor inconsistency in notation removed; format for units in the figures changed