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Science Technology

Calculating A Theoretical Boundary To Computation 583

TMB writes "Lawrence Krauss and Glenn Starkman, astrophysicists at Case Western Reserve University (and in LK's case, author of a number of books including Physics of Star Trek), just submitted this nice little paper to Phys. Rev. Letters. It claims that in an accelerating universe, the existence of a future event horizon puts a fundamental physical limit on the total amount of calculation that can be done, even in an infinite time. This limit is much smaller than the traditional Hawking-Beckenstein entropy. Among other things, this implies that and Moore's Law must have a finite lifetime, here calculated to be 600 years, and that consciousness must be finite."
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Calculating A Theoretical Boundary To Computation

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If you push the "extra ice" button on the soft drink vending machine, you won't get any ice. If you push the "no ice" button, you'll get ice, but no cup.

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