Quantum mechanics of time travel through post-selected teleportation

@article{Lloyd2011QuantumMO,
  title={Quantum mechanics of time travel through post-selected teleportation},
  author={Seth Lloyd and Lorenzo Maccone and Ra{\'u}l Garc{\'i}a-Patr{\'o}n and Vittorio Giovannetti and Yutaka Shikano},
  journal={Physical Review D},
  year={2011},
  volume={84},
  pages={025007}
}
This paper discusses the quantum mechanics of closed timelike curves (CTC) and of other potential methods for time travel. We analyze a specific proposal for such quantum time travel, the quantum description of CTCs based on post-selected teleportation (P-CTCs). We compare the theory of P-CTCs to previously proposed quantum theories of time travel: the theory is physically inequivalent to Deutsch's theory of CTCs, but it is consistent with path-integral approaches (which are the best suited for… 

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