Finding researchers in the U.S. focused on the foundations of quantum mechanics can be challenging, but starting with current literature and review articles can help identify key research groups. Networking is essential, and reaching out to established physicists like Sean Carroll for guidance may yield valuable contacts and insights. Some universities may have limited funding for foundational research, making it crucial to consider potential teaching assistantships and their impact on thesis timelines. Additionally, institutions like the Perimeter Institute in Canada offer opportunities in quantum foundations, which could be worth exploring. Engaging with the academic community and utilizing resources like Google Scholar can enhance the search for suitable PhD programs.