I am looking to apply for PhD programs at university XX. My background is in chemical engineering and biotechnology.
Said university XX has a very ample offer on these areas and there are several projects ranging from rather small scale biotechnology-related topics to projects in a larger scale and more close to process or chemical engineering. And everything in between.
I find a lot of them very attractive and even in the hypothetical case of being accepted for several I would have a hard time deciding between them.
How bad would it be seen if I sent applications to several professors?. Will the professors even find out that I sent applications to their colleagues?. How many are too many?
The university in question is a swiss one, where it is traditional to send your application to each professor individually and doctoral programs where you enroll in a program instead of with a supervisor directly are not very usual.