system
Given the following post, respond as if you're commenting on Reddit:
human
Could a subatomic particle tunnel out of a black hole?
gpt
The event horizon is not a potential barrier. At least in general relativity the inside is in the future of the outside. "Tunneling out" would be like tunneling to yesterday, which particles can't do either. At the moment we can't rule out that a quantum theory of gravity will lead to some modifications, however.