Year: 2014
Type: article
Abstract: We propose a practical scheme to use photons from causally disconnected cosmic sources to set the detectors in an experimental test of Bell's inequality. In current experiments, with settings determined by quantum random number generators, only a small amount of correlation between detector settings and local hidden variables, established less than a millisecond before each experiment, would suffice to mimic the predictions of quantum mechanics. By setting the detectors using pairs of quasars or patches of the cosmic microwave background, observed violations of Bell's inequality would require any such coordination to have existed for billions of years-an improvement of 20 orders of magnitude.
Source: Physical Review Letters
Institutions: University of Chicago, Massachusetts Institute of Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G222768804, Postdoctoral Fellowships: Andrew Friedman: "Dark Energy, Fine-Tuning, and the Multiverse: Testing Theories in Modern Cosmology", Cosmological Research with the 10 meter South Pole Telescope, LABORATORY FOR NUCLEAR SCIENCE - HIGH ENERGY PHYSICS PROGRAM, LABORATORY FOR NUCLEAR SCIENCE - HIGH ENERGY PHYSICS PROGRAM
OpenAlex ID: W2056597044