In a new theory paper by Oliver and Dmitry just published in Physical Review Letters, we show that placing two atoms into a “fish eye cavity” results in a periodic emission and absorption of a single photon between them – similar to an ultrafast ping-pong game at the speed of light. See the press release of TU Wien for more information.
![](https://rottergroup.itp.tuwien.ac.at/wp-content/uploads/2024/01/atoms_in_fisheye.png)