Information Flow of quantum states interacting with closed timelike curves

Details Information Flow of quantum states interacting with closed timelike curves Information Flow of quantum states interacting with closed timelike curves

2010-03-09

arxiv.org/abs/1003.1987v2

Phys Rev A 82, 062330 (2010)

Physics

Quantum Physics

Now includes appendix proving Deutsch's maximum entropy conjecture

Scientific paper

Recently, the quantum information processing power of closed timelike curves have been discussed. Because the most widely accepted model for quantum closed timelike curve interactions contains ambiguities, different authors have been able to reach radically different conclusions as to the power of such interactions. By tracing the information flow through such systems we are able to derive equivalent circuits with unique solutions, thus allowing an objective decision between the alternatives to be made. We conclude that closed timelike curves, if they exist and are well described by these simple models, would be a powerful resource for quantum information processing.

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