By reasoning, and through use of quantum statistical mechanics, Gavassino shows the time tourist's own entropy can't continue to grow as they 'go back', with quantum fuzziness effectively canceling expected disorder to create a parallel entropic timeline that begins and ends at the same points.

closed time loop diagram

Entropic arrow of time (gray arrows) flipping between entry and exit points of a closed timelike circuit. (Gavassino, Classical and Quantum Gravity, 2024)

What would that look like for the contents of the temporally looped spaceship? Processes that we might expect to be linked to entropy would necessarily change, potentially reversing.

Circling back to a spry young grandfather courting your grandmother the first time, the time loop could make his untimely death reversible; your memory of why you ever wanted to murder him in the first place may be erasable. In other words, all bets are off in a closed loop where quantum physics smoothes out any intrusive entropy

[–] [email protected] 5 points 5 days ago (1 children)

Is there a translation for Community College grads?

[–] iceonfire1 4 points 4 days ago

Translation: following time travel, everything resets to exactly as it was before time travel.

Not exactly groundbreaking, considering this is assumed by the premise of a closed timeline curve.

[–] HeyThisIsntTheYMCA 6 points 5 days ago

I don't remember murdering my grandfather. Trust me, if you'd known him, it would have been on your bucket list too.

[–] ProjectPatatoe 4 points 5 days ago

A quick skim of what you copied makes me think of Steins;Gate lol