出典:Wiktionary
Named after Jacob Bekenstein.
Bekenstein bound (複数形 Bekenstein bounds)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/08 17:38 UTC 版)
In physics, the Bekenstein bound is an upper limit on the entropy S, or information I, that can be contained within a given finite region of space which has a finite amount of energy—or conversely, the maximum amount of information required to perfectly describe a given physical system down to the quantum level. It implies that the information of a physical system, or the information necessary to perfectly describe that system, must be finite if the region of space and the energy is finite. In computer science, this implies that there is a maximum information-processing rate for a physical system that has a finite size and energy, and that a Turing machine, with its unbounded memory, is not physically possible unless it has an unbounded size or energy. The universal form of the bound was originally found by Jacob Bekenstein as the inequality