Page–Geilker experiment (source code)

= Page–Geilker experiment
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The Page–Geilker experiment used a quantum random decision to choose a macroscopic source-mass configuration and measured its field with a torsion balance. The observed field followed the configuration in the observed branch rather than the nearly cancelling expectation-value average predicted by the simplest no-collapse <semiclassical Einstein equation>.

https://doi.org/10.1103/PhysRevLett.47.979