The headline seems a bit click-baity, as it refers to the Page-Wooters mechanism which was introduced 30 years ago, and as mentioned in the paper has been extensively studied.
A brief and accessible overview can be found here[2].
However this paper seeks to provide a more concrete and less constrained implementation of the Page-Wooters mechanism in order to connect it to our classical world better that previous attempts.
So while probably not a breakthrough paper, a solid step in an interesting direction.
The headline seems a bit click-baity, as it refers to the Page-Wooters mechanism which was introduced 30 years ago, and as mentioned in the paper has been extensively studied.
A brief and accessible overview can be found here[2].
However this paper seeks to provide a more concrete and less constrained implementation of the Page-Wooters mechanism in order to connect it to our classical world better that previous attempts.
So while probably not a breakthrough paper, a solid step in an interesting direction.
[1]: https://arxiv.org/abs/2310.13386
[2]: https://quantum-journal.org/views/qv-2019-07-21-16/