On 2/17/2012 12:07 PM, Bruno Marchal wrote:
On 17 Feb 2012, at 19:13, meekerdb wrote:
On 2/17/2012 1:48 AM, Bruno Marchal wrote:
You forget that Quantum reality is Turing emulable.
A quantum computer can't compute a function that a TM can't. But when it comes to
emulating reality, it seems there is a difference because quantum reality may be
arbitrarily entangled (which is how decoherence produces quasi-classicality). So there
are no strictly isolated subsystems in a quantum reality.
OK, but still, a quantum computer can simulate any quantum reality (except infinite
quantum Eve Garden, but classical computer cannot simulate infinite classical Eve garden
too, so that does not count here).
But it may count in that the universe is infinite and the classical arises because of
event horizons.
Brent
Now take a quantum computer simulating any quantum reality. Despite the fact that there
are no strictly isolated subsystems in that quantum reality, it can be simulated by a
classical computer.
The classical subsystems of that classical computer (emulating the quantum machine) will
just not be part of that quantum reality.
Bruno
http://iridia.ulb.ac.be/~marchal/ <http://iridia.ulb.ac.be/%7Emarchal/>
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