Physicists reverse time using quantum computer

The underlying paper is also discussed at https://news.ycombinator.com/item?id=19378567

(Side note: https://arxiv.org/abs/1712.10057 is not yet crossrefered, but the "community-canonical" open access verison of https://www.nature.com/articles/s41598-019-40765-6)

Such things are not surprising at the quantum scale: Our standard model of particle physics is invariant under time reversal. However, reversing time on the macroscopical scale is prohibited by thermodynamical and causal arguments and (still?) experimentally inaccessible.