I really need your advice about whether I should change my school or not.I know that this is very long, but please read it.Sorry if my English is not very good!
I am an international student(girl) and this year is my second year of PhD in a well-known private school with an average physics program(top 40). I have two problems with my school: 1-I hate the city that I am in it (now I can see how much it is good to be in a safe and small town) 2-I really like both theoretical particle physics and cosmology(especially the intersection of them) but nobody in our department works on these areas, most of the people here are doing experimental works. Before applying to this department I thought that I want to do Gravity or cosmology but i doubted, during the last semester of my undergrad,after doing a project on cosmology, I found that I really like it, at that time I knew that nobody in this department works in theoretical cosmology, but because this university was the only one that I applied to it(because I didn't have GRE general and this was the only department that told me we will review your application without GRE)I accepted their offer with the hope that I will like the work of one the professors here. and know after studying QFT I'm sure that my real interest is intersection of particle physics and cosmology. I know that it seems unethical to change your university when you are in a PhD program, but I really don't like what they are doing here.
This summer I was a RA in a high energy theory group, the Prof. that I am working with him is a very nice guy and very famous in his field, with enough fund, but after 3 months working in his group I really don't feel that I like it, because it is more nuclear physics.(I like to do both QFT and GR in my research). I have already told him that I'm not sure if I want to continue my work with him or not and he knows that I like to do particle or cosmology, but he said that if I continue my work with him, I can choose another prof. as my second advisor.
That's a really long story.Thare are some other things that I can explain about them, but then my post will be too long and nobody will read it, but if you want I can explain. I am really confused, I don't know what should I do
Thanks for reading it!