From computation to black holes and space-time foam

Details From computation to black holes and space-time foam From computation to black holes and space-time foam

2000-06-29

arxiv.org/abs/gr-qc/0006105v5

Phys.Rev.Lett. 86 (2001) 2946; Erratum-ibid. 88 (2002) 139902

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

A misidentification of computer speeds is corrected. Our results for black hole computation now agree with those given by S. L

Scientific paper

10.1103/PhysRevLett.86.2946

We show that quantum mechanics and general relativity limit the speed $\tilde{\nu}$ of a simple computer (such as a black hole) and its memory space $I$ to $\tilde{\nu}^2 I^{-1} \lsim t_P^{-2}$, where $t_P$ is the Planck time. We also show that the life-time of a simple clock and its precision are similarly limited. These bounds and the holographic bound originate from the same physics that governs the quantum fluctuations of space-time. We further show that these physical bounds are realized for black holes, yielding the correct Hawking black hole lifetime, and that space-time undergoes much larger quantum fluctuations than conventional wisdom claims -- almost within range of detection with modern gravitational-wave interferometers.

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