I think my confusion is cleared up. I lazily overlooked the “semiclassical” bit before posting here. I take it what they mean by semiclassical in this context is the system otherwise being quantum mechanical but ignoring quantum gravitational effects?
Thanks for the response. I think i understood what they were saying. It just didn’t quite make sense to me, because as I understand, only the points where the action doesn’t change contribute to the propagator in the limit of h-bar to zero. So contributions from other paths cancel out. They seem...
Hi, I am new here so apologies if i am not using the right subforum. I don't have a physics background so i am not very technical but i do have a little bit of understanding. I was reading this paper by hawking/hertog and came across something that ended up confusing me.
Here is it:
"Pre-big...