Black Holes Break Causality Beyond Cauchy Horizon
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- Black holes with electric charge and rotation contain a Cauchy horizon where space and time switch roles, allowing for closed time-like curves
- Classical physics relies on causality—past events determining future ones—but this principle fails inside certain black holes beyond the Cauchy horizon
- Closed time-like curves in extreme black hole interiors resemble time loops, making it theoretically possible for future events to affect the past
Why it matters: Physicists studying general relativity must reconcile how determinism collapses in these regions, impacting our understanding of time and reality. If closed time-like curves exist, they challenge the predictability that underpins all physical laws, with implications for quantum gravity theories.
