Calculations for certain quantum systems whose parts interact over long distances will be much easier to perform thanks to the work of a RIKEN physicist and his collaborator, who have extended an assumption that holds for materials with short-range interactions.
![](https://scx1.b-cdn.net/csz/news/tmb/2020/simplifyingl.jpg)
Source:
https://phys.org/news/2020-12-long-range-quantum-interactions-many-body.html