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Physics

Experiment with 37 dimensions shows how strange quantum physics can be

A search for particles鈥 most paradoxical quantum states led researchers to construct a 37-dimensional experiment

By Karmela Padavic-Callaghan

29 January 2025

Particles of light helped test a quantum paradox

Arlume/Alamy

Particles of light that effectively exist in 37 dimensions at once have been used to test an extreme version of a quantum paradox.

鈥淭his experiment shows that quantum physics is more nonclassical than many of us thought. It could be [that] 100 years after its discovery, we are still only seeing the tip of the iceberg,鈥 says at the Technical University of Denmark.

He and his colleagues focused on the Greenberger-Horne-Zeilinger (GHZ) paradox, which shows quantum particles can…

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