Bennett and Schumacher's postselected quantum teleportation is a model of closed timelike
curves (CTCs) that leads to results physically different from Deutsch's model. We show that …

We show that it is possible to clone quantum states to arbitrary accuracy in the presence of a
Deutschian closed timelike curve (D-CTC), with a fidelity converging to one in the limit as the …

The fact that closed timelike curves (CTCs) are permitted by general relativity raises the
question as to how quantum systems behave when time travel to the past occurs. Research …

There has been considerable recent interest in the consequences of closed timelike curves
(CTCs) for the dynamics of quantum mechanical systems. A vast majority of research into …

We explore some implications of the hypothesis that quantum mechanics (QM) is universal,
ie, that QM does not merely describe information accessible to observers, but that it also …

Closed timelike curves are relativistically valid objects allowing time travel to the past.
Treating them as computational objects opens the door to a wide range of results which …

Quantum theory describes our universe incredibly successfully. To our classically-inclined
brains, however, it is a bizarre description that requires a re-imagining of what fundamental …

We consider quantum circuits with time travel designed for distinguishing specific
nonorthogonal quantum states in two of the most popular models: Deutsch's and …

We examine Ralph's equivalent circuit model of D-CTCs, which was proposed to derive
Deutsch's maximum entropy rule of D-CTCs. By constructing counterexamples we show that …

Einstein's field equations of gravitation are known to admit closed timelike curve (CTC)
solutions. Deutsch approached the problem from the quantum information point of view and …