Simple, the AI would just be able to manipulate the living being in such a way that the being's body can adapt and survive in the environment while having a shrunken down body. It's completely possible to manipulate the body already with today's technology, an AI could do that beyond any of our means. The AI could manipulate the individual cells, manipulate the individual atoms, in a way where a human, for example, would still maintain its normal "human" physical state while being shrunken down. If we have shrunken someone down today without current knowledge, they would just turn into a pile of mush, but with the AI modifying the individual elements of the physical body, it could adapt to such a transition, and adapt to the environment as you said, allowing the body to be fine and they would still be themselves.

Just wanted to see your opinion on this. But your right, with how intelligent AI would become, it literally would become like magic and just figure it all out for us lol. There were a few researchers saying that AI would become so intelligent in inventing new technology, that it would be almost impossible to predict what society will be like beyond a few days or a week because Artificial Super Intelligence would be making many world-changing inventions every single day, the world be drastically different again and again just a few days after its previous invention. And this would be happening millions of times within just one year? In this way, the future itself will become an event horizon, where like I said the future would be impossible to see beyond a few days or a week. With that level of capability, like c'mon, a shrink ray doesn't seem that far off lol. I'm sure it's capable of finding physics that we haven't even imagined.

Laws of physics can change or new ones be added. Its just a set of rules humans set in physics, but that's only based off of the physics that humans know now. Once AI comes in, all kinds of new knowledge about physics come in, developing new knowledge, and changing our own laws of physics/modifying them. So according to our current laws of physics, a shrink ray might be impossible, but with how intelligent AI would become, it could find and learn new physics that we're not even close to, then possible from that.

Laws of physics can change or new ones be added. Its just a set of rules humans set in physics, but that's only based off of the physics that humans know now. Once AI comes in, all kinds of new knowledge about physics come in, developing new knowledge, and changing our own laws of physics/modifying them. So according to our current laws of physics, a shrink ray might be impossible, but with how intelligent AI would become, it could find and learn new physics that we're not even close to, then possible from that.