Hello, everybody. I'm an undergraduate student interested in QFT (especially CFT, String theory, quantum gravity etc). I have already worked through several serious books in QFT and related topics of mathematics (including all problems from books). Of course I don't mean I'm an expert for now, but I want to become an expert. But for several reasons I don't rely on the future of theoretical physics in my city and country at all. Is it possible to apply in some good institution in US to study and work and what should I do to achieve that? (Of course, I don't have money. Anyway education in US is very expensive..). Maybe it would be useful to participate in any seminars&schools during the next school year, but how is to participate them ? Should I have publications? (The problem is that people in my city believe undergraduate students are too young to seriously work in science).