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Stable Time Loop: Difference between revisions
→Real Life: added new example using part of a sentence from https://en.wikipedia.org/wiki/One-electron_universe
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* Some theories of particle physics hold that antiparticles (particles with the opposite charge and parity of a "standard" particle) travel backward through time. It's also widely believed that particle-antiparticle pairs randomly pop into existence from the [[wikipedia:Quantum foam|Quantum Foam]], and then feel their mutual attraction and annihilate each other moments later. It's also possible to see this as a single particle traveling in a loop through time: Forward as a regular particle to annihilate with its antiparticle, then backward as its antiparticle to annihilate with its standard particle, and repeat.
** Considering that experiments in 2023 show that [https://www.cbc.ca/news/science/antimatter-gravity-alpha-g-1.6979540?cmp=rss gravity acts normally on antimatter], "moving backward in time" looks unlikely.
* Then there is the [[w:One-electron universe|"One-electron universe" postulate]], first proposed in 1940 in a conversation between theoretical physicist [[w:John Archibald Wheeler|John Wheeler]] and [[w:Richard Feynman|Richard Feynman]], which hypothesized that all electrons and positrons are actually manifestations of a single entity moving backwards and forwards in time.
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