Case: I give you a "live" box with quantum signals going through it (while performing calculations) and which contains quantum logic gates. You don't know exact internal structure of box, but you're allowed to use whatever tech tool to analyse and elaborate it (including open the box and "look" in whatever way you prefer to).
Is there a way to reverse engineer the box, i.e. to provide what is going inside it: 1a. what logic gates it's comprised of? 1b. what data has been passed (bits pattern) from time t1 till t2 through its certain segment?
Is it a must to "shut off" the box (in advance or in the middle) to answer on 1a or 1b?
What are exact steps "to solve" if answer on q1 is "Yes"?
If there is a difference (to answer or to step on) between questions (regarding reverse engineering gates vs reverse engineering data) above - please split your answer accordingly.
P.S. I did't want to ask as separated questions since all sections are strongly co-related each other. P.S. 2: If there are differences from implementation point of view (spin of electrons or entanglement of photons) - please split your answer as well respectively to each scenario. Thanks :)