Paradox free time travel is possible.
Quantum mechanics resolves the problem no matter what interpretation you use.
I noticed a headline in my science news feed the other day:
Naturally, I was intrigued since this is right in my wheelhouse, so I went over and read the paper.
It turns out that the headline is misleading since the paper does not prove time travel is possible. It actually assumes it is possible. Rather, it proves that you can avoid paradoxes. Basically, the paper shows that if a “process” such as a person exists in both their past and future (as you would expect in a paradox) that you can carry out “arbitrary local operations”, i.e., do whatever you want at a particular time and place, without contradictions arising. The work builds on the work of others (which is true of all good science). It is hardly a Back to the Future scenario though.
A story by best selling author of Arrival Ted Chiang, who is one of the smartest and best science fiction short story writers I’ve encountered since Asimov, called “The Merchant and the Alchemist’s Gate” (found in his recent…
