Abstract
Multi-photon states from stimulated parametric down-conversion can be entangled both in polarization and photon number. Maximally high-dimension entanglement can be concentrated from these states via photon-counting. We show experimental results for the concentration of a rotational symmetric four-photon entangled state obtained by stimulated emission of the familiar anti-symmetric two-particle Bell state.1
© 2002 Optical Society of America
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