Testing the speed of ‘spooky action at a distance’

@article{Salart2008TestingTS,
  title={Testing the speed of ‘spooky action at a distance’},
  author={Daniel Salart and Augustin Baas and Cyril Branciard and Nicolas Gisin and Hugo Zbinden},
  journal={Nature},
  year={2008},
  volume={454},
  pages={861-864}
}
Correlations are generally described by one of two mechanisms: either a first event influences a second one by sending information encoded in bosons or other physical carriers, or the correlated events have some common causes in their shared history. Quantum physics predicts an entirely different kind of cause for some correlations, named entanglement. This reveals itself in correlations that violate Bell inequalities (implying that they cannot be described by common causes) between space-like… 
Comment on: Testing the speed of 'spooky action at a distance'
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References

SHOWING 1-10 OF 31 REFERENCES
Experimental violation of a Bell's inequality with efficient detection
TLDR
Here, correlations in the classical properties of massive entangled particles (9Be+ ions): these correlations violate a form of Bell's inequality, and the high detection efficiency of the apparatus eliminates the so-called ‘detection’ loophole.
What is the speed of quantum information
TLDR
The apparent nonlocality of quantum mechanics as a transport problem is studied, and it is shown that the Many Worlds Interpretation is nonlocal because it is what the authors call `spatially complete'.
Experimental test of nonlocal quantum correlation in relativistic configurations
We report on a new kind of experimental investigations of the tension between quantum nonlocally and relativity. Entangled photons are sent via an optical fiber network to two villages near Geneva,
A SUGGESTED INTERPRETATION OF THE QUANTUM THEORY IN TERMS OF "HIDDEN" VARIABLES. II
In this paper, we shall show how the theory of measurements is to be understood from the point of view of a physical interpretation of the quantum theory in terms of hidden variables developed in a
Violation of Bell's Inequality under Strict Einstein Locality Conditions
We observe strong violation of Bell's inequality in an Einstein-Podolsky-Rosen-type experiment with independent observers. Our experiment definitely implements the ideas behind the well-known work by
Violation of Bell Inequalities by Photons More Than 10 km Apart
A Franson-type test of Bell inequalities by photons 10.9 km apart is presented. Energy-time entangled photon pairs are measured using two-channel analyzers, leading to a violation of the inequalities
Possibility of Faster-Than-Light Particles
We consider the possibility of describing, within the special theory of relativity, particles with spacelike four-momentum, which therefore have velocities greater than that of light in vacuum. The
A Realistic Model for Quantum Theory With a Locality Property
A model reproducing the predictions of relativistic quantum theory to any desired degree of accuracy is described in this chapter. It involves quantities that are independent of the observer’s
Optical tests of quantum nonlocality: from EPR‐Bell tests towards experiments with moving observers
Past, present and future experimental tests of quantum nonlocality are discussed. Consequences of assuming that the state‐vector collapse is a real physical phenomenon in space‐time are developed.
Experimental Realization of Einstein-Podolsky-Rosen-Bohm Gedankenexperiment : A New Violation of Bell's Inequalities
The linear-polarization correlation of pairs of photons emitted in a radiative cascade of calcium has been measured. The new experimental scheme, using two-channel polarizers (i.e., optical analogs
...
...