I was enrolled in a PhD at the Faculty of Science, and broke up "temporarily" after 4 years due to a horrible Professor, and restarted a new PhD at the Faculty of Engineering.
For the 1st university, I am still enrolled, but I do not have a formal PhD supervisor.
For the 2nd University, I have collected a huge amount of data which allows me to split the topic in two separated ones (Processing and Characterization).
Now the horrible professor has gone from the 1st university, and there is chance to get re-enrolled with a new Professor.
Would that be possible to re-enroll simultaneously in two PhD programs (Science and Engineering) and write two separate dissertations of my topic at the same time? or at least one main PhD and the 2nd one as "appended thesis" with an introduction chapter, methodology chapter + publications for the experimental part?.
The goal is to recover the 4 years of gap in my CV which has nearly destroyed my Academic career, rather than "collecting" a new title.