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Placing cosmological constraints on quantum gravity phenomenology

 E-Mail A description of gravity compatible with the principles of quantum mechanics has long been a widely pursued goal in physics. Existing theories of this quantum gravity often involve mathematical corrections to Heisenberg s Uncertainty Principle (HUP), which quantifies the inherent limits in the accuracy of any quantum measurement. These corrections arise when gravitational interactions are considered, leading to a Generalized Uncertainty Principle (GUP). Two specific GUP models are often used: the first modifies the HUP with a linear correction, while the second introduces a quadratic one. Through new research published in EPJ C, Serena Giardino and Vincenzo Salzano at the University of Szczecin in Poland have used well-established cosmological observations to place tighter constraints on the quadratic model, while discrediting the linear model.

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