meekerdb wrote:
On 11/10/2014 10:35 PM, Bruce Kellett wrote:
meekerdb wrote:
On 11/10/2014 8:41 PM, Bruce Kellett wrote:
Richard Ruquist wrote:
Bruce,
I questioned Bruno's statement that MWI universe splitting proceeds
at the speed of light on the basis of EPR experiments which seem to
suggest that the splitting proceeds faster than the speed of light.
Could you comment on this? I was unable to understand Bruno's
response.
I often find Bruno's responses opaque, to say the least. I didn't
really understand it either. But I think this might be a point of
dispute in MW circles. If you really do take the wave function to be
the only reality, then that is an intrinsically non-local object, so
splitting is instantaneous everywhere (local in configuration
space!) The trouble with splitting expanding at the speed of light
seems to me that this makes it a dynamical process, and there are no
Schroedinger dynamics for this.
Decoherence is a dynamic process and presumably spreads at SoL.
I don't think it is quite that simple. Sure, decoherence is a physical
process that is no more than SoL. But enough of the environment is
affected within a few microseconds -- before light reaches the lab
walls, for the worlds to have split. The rest of the split is then
instantaneous (think about it....)
You mean for enough of the environment to have interacted so that the
process is effectively irreversible. Yes, I think that's right.
Usually the lab walls and other stuff are only nano-seconds away. But
if a neutron out in space is going to beta decay it may be a while
before significant environment is entangled due to the finite SoL.
Oh, I don't know. The CMB is pretty universal, and that tends to
interact with things.
Bruce
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