Experimental detection of steerability in Bell local states with two measurement settings

Abstract : Steering, a quantum property stronger than entanglement but weaker than non-locality in the quantum correlation hierarchy, is a key resource for one-sided device-independent quantum key distribution applications, in which only one of the communicating parties is trusted. A fine-grained steering inequality was introduced in [PRA 90 050305(R) (2014)], enabling for the first time the detection of steering in all steerable two-qubit Werner states using only two measurement settings. Here we numerically and experimentally investigate this inequality for generalized Werner states and successfully detect steerability in a wide range of two-photon polarization-entangled Bell local states generated by a parametric down-conversion source.
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Submitted on : Friday, December 22, 2017 - 5:37:40 PM
Last modification on : Friday, July 5, 2019 - 3:26:03 PM

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Adeline Orieux, Marc Kaplan, Vivien Venuti, Tanumoy Pramanik, Isabelle Zaquine, et al.. Experimental detection of steerability in Bell local states with two measurement settings. Journal of Optics, Institute of Physics (IOP), 2018, 20 (4), ⟨10.1088/2040-8986/aab031⟩. ⟨hal-01671940⟩

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