>If I have a quantum computer, dont I have to use at least N particles to simulate an N particle system? If we're in a simulation, we can't assume too much abo

>If I have a quantum computer, dont I have to use at least N particles to simulate an N particle system? If we're in a simulation, we can't assume too much about the host reality's physics. Quantum computers or something else capable of simulating quantum physics simply could be easy to make in the host reality. >What am I gaining by using a physical system to simulate a physical system? We run simulations all the time for entertainment and research.