MathDBHawking's chronology protection conjecture
Hawking's chronology protection conjecture
A closed timelike curve is a causal curve that returns to its starting event. The appearance of such curves would constitute a causality violation.
Hawking's chronology protection conjecture. The laws of physics do not allow the appearance of closed timelike curves.
The conjecture is intended to rule out time machines and other constructions producing causality violations. The source discusses it as an influential proposal; its status is not resolved there.
Sources & referencesView supporting material
Primary source
Eleni-Alexandra Kontou and Ko Sanders, “Energy conditions in general relativity and quantum field theory”, arXiv:2003.01815 (2020).
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