I knew I that I wanted to get involved in research since my second year as an undergrad.
I contacted a few of the staff whose work I thought was interesting at my institution and managed to acquire experience with two groups at my institution (through summer work), based on what I was interested in at the time.
However, now in my final year I have settled on a topic that is quite different and will have to go somewhere else to undertake a PhD. This topic is experiments with ultra cold atoms in optical lattices. It sort of combines a few different areas of interesting physics.
Is this a viable option to go for? Is it ethical for me to now just go somewhere else, after staff have been kind enough to let me work for them over the summer? Also this topic is quite different to my dissertation topic? Does this mean its not advisable I choose projects of this kind? I think I am for sure interested in this, but I am a little ignorant about this topic.