Rubidium

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Physics Guy@physicsguy

A team at Shanxi University in China says it has found a way around the Heisenberg uncertainty principle, which limits how precisely paired properties like position and momentum can be known.

Rather than predicting the future, they combined data from before and after each measured moment. Using 52 billion rubidium atoms in a small glass chamber, they got results about 20 percent more precise than the limit allows.

The work is a preprint and has not yet been peer-reviewed. Heisenberg's limit still holds, but the approach gets around it to some extent.

Physicists Say They've Sidestepped a Nearly 100-Year-Old Quantum Limit Using Hindsight