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Updated: Aug 9, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Experimental nonlocality proof of quantum teleportation and entanglement swapping
Thomas Jennewein1, Gregor Weihs, Jian-Wei Pan
1Institut für Experimentalphysik, Universität Wien Boltzmanngasse 5, 1090 Vienna, Austria.
Abstract:
Quantum teleportation strikingly underlines the peculiar features of the quantum world. We present an experimental proof of its quantum nature, teleporting an entangled photon with such high quality that the nonlocal quantum correlations with its original partner photon are preserved. This procedure is also known as entanglement swapping. The nonlocality is confirmed by observing a violation of Bell's inequality by 4.5 standard deviations. Thus, by demonstrating quantum nonlocality for photons that never interacted, our results directly confirm the quantum nature of teleportation.
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