Ultimate limits to computation

[Your Monkey Overlord]

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 ‘ultimate laptop’ with a mass of one kilogram confined to a
volume of one liter.

...

The ultimate laptop performs 2mc^2 /π¯h = 5.4258 × 10^50 logical
operations per second on ≈ 10^31 bits. Although its computational
machinery is in fact in a highly specified 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 ≈ 10^9 degrees Kelvin. The ultimate laptop looks
like a small piece of the Big Bang."""

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