Debbie Leung: Computational and Cryptanalytic consequences of time travel
Debbie Leung, Institute for Quantum Computing
We focus on two particular models of closed time like curves.
The first is Deutsch's 1991 mixed-state-fixed-point model which
abolishes the grandfather paradox. The second is due to Bennett and
Schumacher, in which the grandfather paradox on certain initial states
is exploited as a putative physical mechanism for post-selection.