by
Anonymous Coward
on 2009年10月16日 17時29分
(#1655164)
Reversible computing requires preservation of all information throughout the entire computational process; this implies that all errors that appear as a result of the interaction of the information-carrying system with uncontrolled degrees of freedom must be corrected. But this can only be done at the expense of an increase in the entropy of the environment corresponding to the dissipation, in the form of heat, of the “noisy” part of the system's energy. This Letter gives an expression of that energy in terms of the effective noise temperature, and analyzes the relationship between the energy dissipation rate and the rate of computation. Finally, a generalized Clausius principle based on the concept of effective temperature is presented.
Thermodynamic Cost of Reversible Computing (スコア:0)
Reversible computing requires preservation of all information throughout the entire computational process; this implies that all errors that appear as a result of the interaction of the information-carrying system with uncontrolled degrees of freedom must be corrected. But this can only be done at the expense of an increase in the entropy of the environment corresponding to the dissipation, in the form of heat, of the “noisy” part of the system's energy. This Letter gives an expression of that energy in terms of the effective noise temperature, and analyzes the relationship between the energy dissipation rate and the rate of computation. Finally, a generalized Clausius principle based on the concept of effective temperature is presented.
(情報を捨ててしまわないので無限に省電力な)逆計算可能なシステムであっても、熱雑音の限界があってそれを求めたという話だろ。
ムーアの法則なんて引き合いに出したバカはどいつだ
http://search.goo.ne.jp/web.jsp?IE=utf-8&from=blog-edit&PT=blo... [goo.ne.jp]
Re: (スコア:0)
熱力学と量子力学を同じ位置に並べる人が馬鹿ではないと？
Re: (スコア:0)
あなたのことですか？
Re: (スコア:0)
Lev B. Levitin and Tommaso Toffoli
Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215, USA
筆者コピペするの忘れてた。
レビティンもトフォリも超大物。
http://en.wikipedia.org/wiki/Margolus%E2%80%93Levitin_theorem [wikipedia.org]
http://brownian.motion.ne.jp/memo/max-speed.txt [motion.ne.jp]
http://en.wikipedia.org/ [wikipedia.org]