Experimental demonstration of quantum pigeonhole paradox.
basic_science · Level V
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- Record sourced from PubMed, PMID 30635427.
- Also identified by DOI 10.1073/pnas.1815462116 and PMC identifier 6358669.
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Abstract
We experimentally demonstrate that when three single photons transmit through two polarization channels, in a well-defined pre- and postselected ensemble, there are no two photons in the same polarization channel by weak-strength measurement, a counterintuitive quantum counting effect called the quantum pigeonhole paradox. We further show that this effect breaks down in second-order measurement. These results indicate the existence of the quantum pigeonhole paradox and its operating regime.