Is Time's Arrow Perspectival? · HackerPapers discussions

Is Time's Arrow Perspectival? — mentioned by goldenkey

Tue, 14 Nov 2023 23:38:37 GMT

Thanks for the paper. Brownian computers are a cool idea, they seem like exploitation of the ratcheting paradigm. Entropy increasing is a illusion based on the specific selection of macroscopic observables / slices of configuration space that we use as inputs for entropy. There is no information lost as much as some species that live on certain observable sense space slices, becoming ignorant and unable to exploit the new patterns of information flow. Chaos and order are two sides of the same coin. There will be brownian computers, funny enough, in chaotic environments. Whereas there might be…

Paper and discussion history. A mention is not an endorsement.

Is Time's Arrow Perspectival? — mentioned by goldenkey

Sat, 25 Sep 2021 21:42:33 GMT

Entropy itself is somewhat dubious as Carlo Rovelli gets into with the idea of relative entropy and course-graining. Entropy only exists with regard to a representation / set of observable operators. When you change your basis, you get a new entropy. So the cold ant, looks like it has low entropy because you've used the temperature observable. Under the structural/integrated-information observables, it would have a much higher entropy. Read more here: Is Time’s Arrow Perspectival? - Carlo Rovelli https://arxiv.org/pdf/1505.01125.pdf

Paper and discussion history. A mention is not an endorsement.

Is Time's Arrow Perspectival? — mentioned by raattgift

Thu, 22 Nov 2018 03:50:57 GMT

I haven't read Rovelli's pop-sci book. Could you glance through the table of contents and/or the index and look for, among other things, "thermal time" and "time emerges in a world without time"? I would be astonished if he did not discuss these ideas at length in his book. > Rovelli's words from a book 23 years newer than your referenced article, seem to directly contradict what you're arguing Ok, let's deal with that. It's not like he stopped writing on the topic or substantially changed his position (rather than elucidating it). You can click on arXiv:1505.01125, arXiv:1407.3384, and…

Paper and discussion history. A mention is not an endorsement.