We examine black holes in five-dimensional gravity with Gauss-Bonnet corrections (capturing higher-order curvature effects). Reducing to an effective four-dimensional picture gives rise to a scalar field and nonlinear couplings, with holes classified by mass and charges. A surprise: even a neutral hole has an extreme mass limit, and for charged extreme configurations, temperature and entropy don't vanish—unlike standard theories. It evokes a system that never settles to absolute rest: leftover heat as an echo of hidden dimensions.
Black holes resemble funnels in a stretched sheet. But if we allow a fifth dimension, the sheet gains hidden springs. Any mass—even uncharged—indents it not to infinity, but to a clear limit. Thus, spacetime curvature gets nonlinear corrections—a new kind of black holes with an innate minimum mass.
And the main surprise: reaching that limit, the hole doesn't cool to absolute zero. Its entropy—a measure of hidden disorder—doesn't vanish, as standard theory would demand. It turns out the universe is strewn with invisible warm cores that hold the memory of hidden dimensions.
🎯 Usually, an uncharged black hole should evaporate completely. But with an extra dimension, it leaves behind a warm, indestructible clot of spacetime.
🎬 It brings to mind 'Interstellar': Gargantua warped time thanks to hidden dimensions. This work makes the science fiction a bit more real.