Physicists have discovered the culinary secret of black holes. The 'double copy' trick transforms a simple soup recipe (an electric field) into a fancy roast (gravity). It turns out that the famed Hawking radiation is merely a double copy of particles being born in an electric field, a process with neither temperature nor horizon. The hot effect springs from cold ingredients. This trick might help marry the quantum world with gravity.
🎯 Particle creation in a strong electric field (the Schwinger effect) has never been observed in the lab—the energy needed is staggering. However, its double copy, Hawking radiation, is what astronomers aim to catch at the rims of real black holes.