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IMAGE: Artistic imagery about the famous Bell experiments, with ballet dancers personifying experimental arrangements in space-time separated labs. The strings of ones and zeros allude to the violation of free choice. view more
Credit: Source: IFJ PAN / Iwona Michniewska
Do we have free choice or are our decisions predetermined? Is physical reality local, or does what we do here and now have an immediate influence on events elsewhere? The answers to these questions are sought by physicists in the Bell inequalities. It turns out that free choice and local realism can be skilfully measured and compared. The results obtained reveal surprising relationships of a fundamental and universal nature, going far beyond quantum mechanics itself.