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While the possibility of time travel in physics is still debated, theexplosive growth of virtual-reality simulations opens up new possibilities torigorously explore such time travel and its consequences in the digital domain.Here we provide a computational model of time travel and a computer programthat allows exploring digital time travel. In order to explain our method weformalize a simplified version of the famous grandfather paradox, show how thesystem can allow the participant to go back in time, try to kill theirancestors before they were born, and experience the consequences. The systemhas even come up with scenarios that can be considered consistent "solutions"of the grandfather paradox. We discuss the conditions for digital time travel,which indicate that it has a large number of practical applications.

A computer program for simulating time travel and a possible 'solution' for the grandfather paradox