Vacuum Energy - Pair Production Confusion

[humanino]

...

Well this may be confusing. The definition of the vacuum to start with is the state with the lowest possible energy, and only energy differences matter : at this point with do not need perturbative methods. I think it is worth emphasizing before embarking into perturbative calculations of the energy of the fluctuations.

 

[malawi_glenn]

Well this may be confusing. The definition of the vacuum to start with is the state with the lowest possible energy, and only energy differences matter : at this point with do not need perturbative methods. I think it is worth emphasizing before embarking into perturbative calculations of the energy of the fluctuations.

I actually wrote something similar yesterday.. I thought it was in this particular thread.. that is why I wrote about perturbation calculations in my latest posts.. doh, I must get my memory back :D