Corpus ID: 118501672

Any quantum state can be cloned in the presence of closed timelike curves

  title={Any quantum state can be cloned in the presence of closed timelike curves},
  author={Doyeol Ahn and Timothy C. Ralph and Robert B. Mann},
  journal={arXiv: Quantum Physics},
The possible existence of closed timelike curves (CTCs) draws attention to fundamental questions about what is physically possible and what is not. An example is the "no cloning theorem" in quantum mechanics, which states that no physical means exists by which an unknown arbitrary quantum state can be reproduced or copied perfectly. Using the Deutsch approach, we show here that this theorem can be circumvented in the presence of closed timelike curves, allowing the cloning of an unknown… Expand
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