宇宙的计算能力。

Computational capacity of the universe.

作者信息

Lloyd Seth

机构信息

d'Arbeloff Laboratory for Information Systems and Technology, MIT Department of Mechanical Engineering, MIT 3-160, Cambridge, Massachusetts 02139, USA.

出版信息

Phys Rev Lett. 2002 Jun 10;88(23):237901. doi: 10.1103/PhysRevLett.88.237901. Epub 2002 May 24.

DOI:10.1103/PhysRevLett.88.237901

PMID:12059399

Abstract

All physical systems register and process information. The laws of physics determine the amount of information that a physical system can register (number of bits) and the number of elementary logic operations that a system can perform (number of ops). The Universe is a physical system. The amount of information that the Universe can register and the number of elementary operations that it can have performed over its history are calculated. The Universe can have performed 10(120) ops on 10(90) bits ( 10(120) bits including gravitational degrees of freedom).

摘要

所有物理系统都记录和处理信息。物理定律决定了一个物理系统能够记录的信息量（比特数）以及一个系统能够执行的基本逻辑操作数（操作数）。宇宙是一个物理系统。计算了宇宙能够记录的信息量以及在其历史中能够执行的基本操作数。宇宙能够在10⁹⁰比特上执行10¹²⁰次操作（包括引力自由度在内为10¹²⁰比特）。