[144737] in cryptography@c2.net mail archive
Re: Ultimate limits to computation
daemon@ATHENA.MIT.EDU (Your Monkey Overlord)
Fri Aug 14 14:31:33 2009
In-Reply-To: <20090811184727.69F4D14F6E2@finney.org>
Date: Fri, 14 Aug 2009 07:06:56 -0700
From: Your Monkey Overlord <mr.monkey@gmail.com>
To: Hal Finney <hal@finney.org>, leichter@lrw.com, cryptography@metzdowd.com
Seth Lloyd, "Ultimate physical limits to computation":
http://arxiv.org/abs/quant-ph/9908043
"""As an example, quantitative bounds are put to the computational
power of an =E2=80=98ultimate laptop=E2=80=99 with a mass of one kilogram c=
on=EF=AC=81ned to a
volume of one liter.
...
The ultimate laptop performs 2mc^2 /=CF=80=C2=AFh =3D 5.4258 =C3=97 10^50 l=
ogical
operations per second on =E2=89=88 10^31 bits. Although its computational
machinery is in fact in a highly speci=EF=AC=81ed physical state with zero
entropy, while it performs a computation that uses all its resources
of energy and memory space it appears to an outside observer to be in
a thermal state at =E2=89=88 10^9 degrees Kelvin. The ultimate laptop looks
like a small piece of the Big Bang."""
Order yours today!
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