Experimental test of photonic entanglement in accelerated reference frames

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Abstract

The unification of the theory of relativity and quantum mechanics is a long-standing challenge in contemporary physics. Experimental techniques in quantum optics have only recently reached the maturity required for the investigation of quantum systems under the influence of non-inertial motion, such as being held at rest in gravitational fields, or subjected to uniform accelerations. Here, we report on experiments in which a genuine quantum state of an entangled photon pair is exposed to a series of different accelerations. We measure an entanglement witness for g-values ranging from 30mg to up to 30 g-under free-fall as well on a spinning centrifuge-and have thus derived an upper bound on the effects of uniform acceleration on photonic entanglement.

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Fink, M., Rodriguez-Aramendia, A., Handsteiner, J., Ziarkash, A., Steinlechner, F., Scheidl, T., … Ursin, R. (2017). Experimental test of photonic entanglement in accelerated reference frames. Nature Communications, 8. https://doi.org/10.1038/ncomms15304

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