But ghosts exist! Take for instance quantum chromodynamics (the quantum theory of the strong interactions). There are several ways to do any calculation, and one of them allows to introduce non-physical stuff in the calculations in order to simplify them. But then, one needs to remove those unphysical components at the end of the day. This is achieved by means of ghost contributions...
[I over simplified it but I feel this is still tough to get :p]
Here are our ghosts, special quantum fields. Ok, I agree this is not what anyone who may think about :D
Quantum chromodynamics? I was thinking of something more in the lines of Anton’s syndrome, psychotic episodes, halluciantions etc... to explain ghosts 😅
Oh by the way, you have failed at simplifying that 😛
No time to succeed and no blackboard. Hard to explain without equations. This is terribly technical :D
😅