On 29 Nov 2017, at 20:41, Brent Meeker wrote:
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).
What precisely means "out there" in the Everett theory? Is not
"blowing up the CC" like saying that Everett theory does not conserve
the mass?
I really don't know. I should revise QED, in the Everett approach. Not
simple. if you know some references which can help?
Thanks,
Bruno
Brent
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