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Scientists solve decades-old 2D physics puzzle — Chaotic growth in a 2D quantum system obeys statistical laws

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Tom's Hardware

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Researchers at the University of Würzburg have confirmed a 40-year-old physics theory by demonstrating that chaotic growth in a 2D quantum system follows the Kardar–Parisi–Zhang (KPZ) equation. This breakthrough, published in Science, extends the KPZ model to more realistic 2D environments, improving understanding of complex growth processes in non-equilibrium systems. By engineering a controlled quantum system using a GaAs semiconductor cooled to near absolute zero, the team generated polaritons to study growth dynamics. Through spectroscopy and interferometry, they observed that the behavior of polaritons aligns with statistical patterns predicted by the KPZ equation in two dimensions.

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