Comment on “Information flow of quantum states interacting with closed timelike curves”
Waldemar Kłobus, Andrzej Grudka, Antoni Wójcik · Physical Review A · 2011
We show that recent results on the interaction of causality-respecting particles with particles on closed timelike curves derived in [Phys. Rev. A 82, 062330 (2010)] depend on ambiguous assumptions about the form of the state which is inputted into the proposed equivalent circuit. Choosing a different form of this state leads to an opposite conclusion on the power of closed timelike curves.