On 11/29/2017 2:21 AM, Bruno Marchal wrote:
I think what I was thinking here were "closed loop feyman diagrams",
where any possible diagram might be drawn in the tiniest area of
space, so long as it is closed, e.g. fluctuations/particle creations
are permitted so long as they all cancel out. So if space is
physical, and enables any of these fluctuations to happen, then this
noise can take any possible value from the observer's point of view
(like the polarization of a photon).
That could make sense. But I am still not at ease with quantum field
theory enough, notably on how to interpret the "virtual particles". I
would treat them as superposition, but some remark by Brent sometimes
ago made me doubt this. I am not enough competent on this to get my
hand to it.
Virtual particles should only be thought of in terms of measurements,
i.e. calculations of what happens in an interaction with something we
treat as classical. There's no reason to postulate they are "out there"
independent of interactions, and good reasons not to (like blowing up
the CC).
Brent
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