Greetings ! I remember posting a partially(I intend to add a different more profound example, if I get some feedback on this enitial message) similar thread here before called "gravitational double slit", but for some reason I couldn't find it. Anyway, basicly I was asking wheather physics can answer the following question today (or at least what is the majority opinion on this issue) : What would happen if gravitational waves were used instead of electromagnetic waves to detect the quantum in the double slit experiment ? Would there be a "detection" ? Would it collapse the WF ? Would the HUP be violated if the first answer is yes and the second is no ? (At least make your best guess. ) Live long and prosper.