Phys. Rev. Lett. 88, 237901 (2002) [4 pages]
Computational Capacity of the Universe
Seth Lloyd*
d'Arbeloff Laboratory for Information Systems and Technology, MIT Department of Mechanical Engineering, MIT 3-160, Cambridge, Massachusetts 02139
Received 23 January 2002; published 24 May 2002
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 10120 ops on 1090 bits ( 10120 bits including gravitational degrees of freedom).
© 2002 The American Physical Society
URL:
DOI:
10.1103/PhysRevLett.88.237901
PACS:
03.67.Lx, 89.70.+c, 98.80.Hw
*Electronic address: slloyd@mit.edu
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