Optical simulation of a Popescu-Rohrlich Box

  title={Optical simulation of a Popescu-Rohrlich Box},
  author={Wen-Jing Chu and Xiao-Lan Zong and Ming Yang and Guo-zhu Pan and Zhuo-Liang Cao},
  journal={Scientific Reports},
It is well known that the fair-sampling loophole in Bell test opened by the selection of the state to be measured can lead to post-quantum correlations. In this paper, we make the selection of the results after measurement, which opens the fair- sampling loophole too, and thus can lead to post-quantum correlations. This kind of result-selection loophole can be realized by pre- and post-selection processes within the “two-state vector formalism”, and a physical simulation of Popescu-Rohrlich (PR… 
Violation of space–time Bell-CHSH inequality beyond the Tsirelson bound and quantum cryptography
Here we show that if we insert context-dependent local unitary evolutions into the spatial (i.e. normal) Bell–Clauser–Horne–Shimony–Holt (Bell-CHSH) test, then it is possible to violate the
Entanglement and impropriety
The relationship between quantum entanglement and classical impropriety is considered in the context of multi-modal squeezed states of light. Replacing operators with complex Gaussian random


Tailored two-photon correlation and fair-sampling: a cautionary tale
We demonstrate an experimental test of the Clauser-Horne- Shimony-Holt (CHSH) Bell inequality which seemingly exhibits correlations beyond the limits imposed by quantum mechanics. Inspired by the
Observation of tunable Popescu-Rohrlich correlations through postselection of a Gaussian state
We show that nonlocal Popescu-Rohrlich correlations can be observed in the postselected results of binned position measurements on a two-party Gaussian state. Our experiment is based on the spatial
Loophole-free Bell inequality violation using electron spins separated by 1.3 kilometres
The data imply statistically significant rejection of the local-realist null hypothesis and could be used for testing less-conventional theories, and for implementing device-independent quantum-secure communication and randomness certification.
Significant-Loophole-Free Test of Bell's Theorem with Entangled Photons.
A Bell test is reported that closes the most significant of loopholes that provide loopholes for a local realist explanation of quantum mechanics, using a well-optimized source of entangled photons, rapid setting generation, and highly efficient superconducting detectors.
Quantum-mechanical realization of a Popescu-Rohrlich box
We consider quantum ensembles which are determined by pre- and post-selection. Unlike the case of only preselected ensembles, we show that in this case the probabilities for measurement outcomes at
Experimental amplification of an entangled photon: what if the detection loophole is ignored?
The experimental verification of quantum features, such as entanglement, at large scales is extremely challenging because of environment-induced decoherence. Indeed, measurement techniques for
Information Causality in the Quantum and Post-Quantum Regime
This work simulates correlations that are stronger than allowed by quantum mechanics by exploiting the effect of polarization-dependent loss in a photonic Bell-test experiment and highlights the special importance of anisotropic regions of the no-signalling polytope in the study of fundamental principles.
Generation of Fresh and Pure Random Numbers for Loophole-Free Bell Tests.
We demonstrate extraction of randomness from spontaneous-emission events less than 36 ns in the past, giving output bits with excess predictability below 10^{-5} and strong metrological randomness