Going back to the roots. Using analog computing to solve complex systems.

Many physics phenomenons can be described via PDEs ( partial differential equations). A simple example is that of a vibrating membrane.

Another one which I am familiar with is calculating the rate of the fission reaction in a nuclear reactor, taking into account things like control rods, moderators and other chemicals.

Years ago, before the advent of heavy computational power, some of these simulations were done using analog computers. Most equations could be mapped to electronic components ( resistors, capacitors, etc..).

I remember experimenting with one in the early 80's in Saclay ( France, atomic energy center , CEA).

So, this concept is not new, but that recent research paper shows it can be pushed a step further using electromagnetic wave propagation in cleverly chosen arrangement of materials.




https://physicsworld.com/a/electromagnetic-waves-solve-partial-differential-equations/