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The Quest to Prove the Existence of a New Type of Quantum Particle


A new proposal makes the case that paraparticles—a new category of quantum particle—could be created in exotic materials.

On a quiet pandemic afternoon in 2021, Zhiyuan Wang, then a graduate student at Rice University, was alleviating his boredom by working on a weird mathematical problem. This January, Wang, now a postdoctoral researcher at the Max Planck Institute of Quantum Optics in Germany, and Hazzard published their refined result in the journal Nature. A collection of theorems called DHR theory, after the mathematical physicists Sergio Doplicher, Rudolf Haag, and John Roberts, proved that if certain assumptions are true, only bosons and fermions are physically possible.

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