On 12-05-2022 00:44, Brent Meeker wrote:
On 5/11/2022 1:06 PM, smitra wrote:
That's complete and audacious question begging. What you mean by
"real" is "modeled within the SE". There is NOTHING BUT collapse
experimentally; every result recorded in every notebook and every
tape
is evidence of a collapse.
There is effective collapse in experiments we do, but the
experiments nevertheless demonstrate that the fundamental processes
proceed under unitary time evolution.
Except when you measure them and actually get a result.
No, there exist no experiment results that demonstrate that unitary time
evolution is not exactly valid. What you are referring to is that in
experiments we do the wavefunction of the measured system (effectively)
collapses. But, because we also know from all the experimental results
that the wavefunction evolves in a unitary way, and experiments are
ultimately nothing more that many particle interactions, that either
unitary time evolution cannot be exactly valid or that the collapse
during measurement is an artifact of decoherence where the observer (and
the local environment) gets into an entangled superposition with the
measured system. The former hypothesis lacks experimental support.
Saibal
Brent
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