On 8/3/2012 11:09 AM, ronaldheld wrote:
arXiv:1208.0493v1 [quant-ph]
Hi Ronald,
A nice paper! A quote from it:
"In this work we introduce a postulate named Existence of an Information
Unit, which essentially states that there is only one type of
information within the theory. Consequently, any physical process can be
simulated with a suitably programmed general purpose simulator. As the
input and output of the simulation need not be classical, this also
generalizes the ChurchTuring-Deutsch Principle (stated in [9]). An
alternative way way to read this is that, at some level, the dynamics of
any system is substrate-independent. Existence of an Information Unit
allows us to refer to states, dynamics and measurements abstractly,
without specifying the type of system they pertain to. And this is
exploited by quantum information scientists, who design algorithms and
protocols at an abstract level, without considering whether they will be
implemented with light, atoms or any other type of physical substrate.
More precisely, Existence of an Information Unit states that there is a
type of system, the generalized bit or gbit, such that the state of any
other system can be reversibly encoded in a sufficient number of gbits
(see Figure 1). In classical probability theory the gbit is the bit, and
in QT it is the qubit.
*_/The reversibility of the encoding implies a correspondence between
the states of any system and the states of a multi-gbit system (or an
appropriate subspace). This correspondence also extends to dynamics and
measurements: if our system lacks a particular dynamics then we can
encode its state into a multi-gbit system, engineer the desired
multi-gbit dynamics, and decode back the resulting state to our
system---effectively implementing the desired dynamics in our system./_*
We also require that gbits have some additional properties, in
particular Information Causality." (My highlighing included)
Sound vaguely familiar! "A physical system is its own best possible
simulation..." Now I know who I can blame for that idea! Wait... I wrote
about that idea before Aug. 3, 2012 .... LOL! It's nice to see the idea
discussed by others. 8-)
Now to read further and see if they grokked the Boolean
representable idea...
--
Onward!
Stephen
"Nature, to be commanded, must be obeyed."
~ Francis Bacon
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