Here’s the list to look at for U Rochester:
http://www.pas.rochester.edu/people/faculty/index.html
Check interests on the main page, and websites of those who sound intriguing for more specifics.
And here’s the list for Amherst:
https://www.amherst.edu/academiclife/departments/physics/faculty
Looks like you have to click on full profiles for them to get better info, but that’s easily done if you want to compare.
Pick the school that has the most you’re interested in.