Re: why can't we erase information?

From: Russell Standish <r.standish.domain.name.hidden>
Date: Tue, 11 Apr 2006 20:56:08 +1000

There would have to be some pretty major conditions and caveats on
this. A system undergoing thermodynamic stress (ie is nonequilibrium)
will exhibit a lowering of entropy compared with its state at
equilibrium. However, the process is decidedly nonreversible...

Cheers.

On Tue, Apr 11, 2006 at 09:18:01AM +0200, Ti Bo wrote:
>
>
> Hi All,
>
> I feel like a Toffoli disciple. I cannot recreate the argument right
> now,
> but he argues that an increase in entropy is compatible with reversible
> and irreversible
> processes, but a decrease in entropy is only compatible with reversible
> dynamics.
>
> The argument is interesting and the book where it appears (he was
> talking at
> the "Data Ecologies 05" event last year) is due out "some time soon"...
>
> cheers,
>
> tim
>
>
>
> On Apr 11, 2006, at 4:26 AM, Jesse Mazer wrote:
> > Likewise, I think "the second law is interpreted as the destruction of
> > information" needs a bit of clarification--as entropy increases, there
> > are
> > more and more microstates compatible with a given macrostate so the
> > observer
> > is losing information about the microstate, but information is not
> > really
> > being lost at a fundamental level, since *in principle* it would
> > always be
> > possible to measure a system's exact microstate.
> >
>
>
>
>
>
-- 
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Received on Tue Apr 11 2006 - 18:23:20 PDT

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