A good way to meet your future adviser (besides already being located at their institution) is to go to conferences or workshops on the topic that you are interested. Referring to the topics of interest that you have mentioned specifically, a list of relevant conferences (as well as some other information) can be found at the Local Quantum Physics Crossroads portal. It is not as active as it could be, and the Covid-19 pandemic has significantly reduced the number of meetings that are currently running. But it might still be helpful.
Of course, if you'd like to find a PhD position tomorrow, this method is not so useful. It is by nature opportunistic and does require some months of advanced planning.