A significant-loophole-free test of Bell's theorem with entangled photons

Author(s): M. Giustina, M.A.M. Versteegh, S. Wengerowsky, J. Handsteiner, A. Hochrainer, K. Phelan, F. Steinlechner, J. Kofler, J-A. Larsson, C. Abellan, W. Amaya, V. Pruneri, M. W. Mitchell, J. Beyer, T. Gerrits, A. Lita, L. K. Shalm, S. Woo Nam, T. Scheidl, R. Ursin, B. Wittmann, A. Zeilinger

Journal: Phys. Rev. Lett

Volume: 115

Page(s): 250401

Year: 2015

DOI Number: 10.1103/PhysRevLett.115.250401

Link: Link to publication

Abstract:

Local realism is the worldview in which physical properties of objects exist independently of measurement and where physical influences cannot travel faster than the speed of light. Bell's theorem states that this worldview is incompatible with the predictions of quantum mechanics, as is expressed in Bell's inequalities. Previous experiments convincingly supported the quantum predictions. Yet, every experiment performed to date required assumptions that provide loopholes for a local realist explanation. Here we report a Bell test that closes the most significant of these loopholes simultaneously. Using a well-optimized source of entangled photons, rapid setting generation, and highly efficient superconducting detectors, we observe a violation of a Bell inequality with high statistical significance.

Note: http://arxiv.org/abs/1511.03190

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