What is expected from a post-doc application?
Is it possible to apply with a proposal like "I want to make international publications based on my PhD Thesis during my post-doc"


This is appropriate if you want to pursue a post-doc with your PhD advisor, or you want to pursue a post-doc with an advisor that will allow you to do whatever you want. It is inappropriate if the advisor has their own research agenda.


  Does someone have to formulate an entirely new research question/proposal in the application? 


This is appropriate if the advisor doesn't have their own agenda.