Quantum “Time Travel” with Closed Timelike Curves (Simulations): Physicists simulate closed timelike curves (CTCs)—theoretical time loops—using quantum systems to explore paradoxes like killing one’s grandfather. By entangling particles and manipulating their states, researchers mimic retrocausal effects. Experiments show consistency: outcomes adjust to avoid contradictions, supporting the “self-consistency principle.” While not real time travel, these simulations test how quantum mechanics might resolve temporal paradoxes. They suggest that if CTCs exist, quantum rules could prevent logical inconsistencies. This research deepens understanding of time, causality, and quantum gravity, offering insights into how the universe might handle time loops without breaking down.
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