[extropy-chat] Is Many Worlds testable?
eugen at leitl.org
Fri Dec 29 23:12:00 UTC 2006
On Fri, Dec 29, 2006 at 10:48:07PM +0000, Russell Wallace wrote:
> Perhaps not; I just doubt it can be made _that_ reversible. Basically
> the idea is, once the output is recorded, rewind the computation and
> reclaim the energy as heat. Now, theoretically nondissipating systems
> like transformers, electric motors and generators, mechanical drive
> trains etc, if well designed, typically have efficiency in the range
> 90-99% don't they? It seems plausible to suggest the efficiency of
> reversible computers will be similar, which would suggest the ability
> to process 10-100 bits per ln(2)kT energy dissipation, unless I'm
> overlooking something?
I don't think you're overlooking anything. I just don't think it's much
of a limit on practical computation, simply because ln(2)kT is so absurdly
low it vanishes in the noise floor of biological neurons. If you still
leak 1%, that pushes things even further.
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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