I reached the PI via email. We arranged a 20 min phone call. I flew to New Haven to give a 1hour talk in front of faculty members of the department (they paid for everything). People were friendly but cold (you sense the Yale ambience). I met with group members and a couple of faculty in person for a 15 talk each.

I contacted directly to the PI and then arranged a zoom meeting. I was asked to give them a presentation about PhD work and then I was asked different questions related to my Project.