In DepthQuantum Theory

Paradox puts objectivity on shaky footing

See allHide authors and affiliations

Science  21 Aug 2020:
Vol. 369, Issue 6506, pp. 889-890
DOI: 10.1126/science.369.6506.889

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Summary

Researchers in Australia and Taiwan have offered perhaps the sharpest demonstration that a classic quantum paradox is real. In a study published this week in Nature Physics, they transform a thought experiment into a mathematical theorem that confirms the irreconcilable contradiction at the heart of the scenario. The team also tests the theorem with an experiment, using photons as proxies for the humans. Whereas some researchers believed resolving the paradox requires quantum mechanics to break down for large systems such as human observers, some of the new study's authors believe something just as fundamental is on thin ice: objectivity. The puzzle could mean there is no such thing as an absolute fact, one that is as true for me as it is for you.

View Full Text

Stay Connected to Science