There are a few things that I don't understand here.
1. From the topic of this thread, it appears that you think you have to stay "permanently" at the location of the school to do a PhD? Where did you get this idea? This is false if this is what you think is required.
2. When you do your PhD, practically all schools REQUIRE that you spend some time in residence, especially since you need to have a good contact with your advisor, and may have to complete requirements such as preliminary exams, etc. I don't know of ANY reputable school that will allow you to complete a physics PhD without ever attending or being present physically at that school for a period of time. You may not have to spend your entire length of the program there, but you will have to spend some (at least, it isn't "permanent", no?).
Zz.