On 05-12-2017 22:48, Bruce Kellett wrote:
On 5/12/2017 10:56 pm, smitra wrote:
On 05-12-2017 12:44, Bruce Kellett wrote:
On 5/12/2017 10:20 pm, smitra wrote:
Bruno is right and the article itself makes this claim explicitly.
Even if one can write down a state that does contain sufficient
information, this wouldn't be relevant. In the MWI all the
alternative branches also exist and the observer cannot distinguish
between one branch and an infinitesimally different micro-branch,
and the outcome of the coin toss is going to be different between
those branches.
But the observer cannot switch between branches. So in the branch in
which he makes the toss, there is only one outcome, no further split.
Bruce
If you throw a coin, you don't know how your muscles will exactly go
about implementing this. So, even what would pass for an exact
physical state in an effective classical description that would yield
a deterministic outcome, isn't accessible to you.
That just gives you classical deterministic probabilities, arising
because of incomplete knowledge about the initial state.
You don't know which of the different effective branches you are in
that will lead to the coin being thrown slightly differently, and that
means that, generically, you are in some superposition (entangled with
the environment) of a wide range of different branches where different
outcomes are realized.
That is incorrect. Ignorance of the initial state does not lead to a
superposition.
In this case it does, as I've explained below.
Now, you could then say that you were already split from the start,
but as far as your consciousness is concerned (defined as some
bitstring containing all the information you are aware of), you are in
a superposition, because the bitstring does factor out of the
entangled superposition as long as the bitstring itself does not
contain the relevant information here.
I think you are talking about some other theory, that bears only scant
resemblance to quantum mechanics -- using a few of the same terms, but
not sharing any of the mathematical foundations.
No, it trivially follows from ordinary QM.
Saibal
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