We can definitely simulate things approximately, but exact simulations are another matter entirely, and how much do you lose in the approximation? PBS spacetime

We can definitely simulate things approximately, but exact simulations are another matter entirely, and how much do you lose in the approximation? PBS spacetime discussed the intractability of simulating even one atom exactly: https://www.youtube.com/watch?v=55c9wkNmfn0 https://www.youtube.com/watch?v=55c9wkNmfn0