Physicists knew black holes eventually disappear particle by particle. Now they think everything else does, too
Stars, planets, people and petunias: everything emits a special kind of radiation and will, if it sticks around long enough, evaporate into nothing.
Hawking wanted to know what would happen to pairs of particles—a particle and its antiparticle partner—that spontaneously appeared at a black hole’s event horizon. These couplets emerge from the “empty” vacuum of space, and quantum mechanics tells us they constantly wink in and out of existence everywhere. As soon as a particle meets up with its antiparticle, they destroy each other in a fraction of a second, and the universe at large doesn’t notice their presence.
Falcke enlisted the help of quantum physicist Michael Wondrak and mathematician Walter van Suijlekom, both at Radboud, to take another look at the issue. The trio decided to approach the topic from an atypical angle by using equations from a related phenomenon known as the Schwinger effect. This effect describes how charged particles and antiparticles get torn apart when they emerge from the vacuum in the presence of a powerful electromagnetic field.
France Dernières Nouvelles, France Actualités
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