Room C1 "Rumination"

Familiarise yourself with the location of the receiver to open the exit door. You'll note that it's behind a series of five doors.

Note also that the receiver that opens the doors has a very short timer. Do you think the doors will be held open for long enough for a particle to travel all the way down the corridor and through each of them?

If not, how else might it be possible to get a particle through all the doors?

What if the doors opened several times, allowing the particle to pass through each in turn?

Simply stepping on the button multiple times won't work as that causes an particles to be reset.

So what you need is a way for multiple particles to enter the receiver from just a single button press.

What mechanisms do you know of to create multiple particles?

You're given a splitter at the start of the puzzle, but that will only give you two particles. You could combine it with another arrow, but that would still only make three, and you need at least five.

What if you could use the same splitter multiple times?

Look for a way to loop a split particle around, back onto the splitter.

You'll need to use entanglement to do it.

Then it's simply a matter of getting the correct spacing and timing so the doors open as the particle arrives at them.