Chronology Protection

Image from Steve Bowers

The universe seems to counteract attempts to produce time machines, for example due to Visser decay and related vacuum phenomena undermining other forms of time communication. Although the strict Chronology Protection Conjecture by the information age physicist Hawking was subsequently disproved, the chronology protection theorems of Lang, Picard and Joel-5 showed that this tendency can be explained from the consistency theorems, information physics and (eventually) vacuum physics.

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Development Notes
Text by Anders Sandberg
Initially published on 24 September 2001.

See Also

Why is there no Time Travel in Orion's Arm?