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arXiv quant-ph/0701237quant-ph
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可逆计算的热力学代价

Thermodynamic cost of reversible computing

Lev B. Levitin, Tommaso Toffoli

摘要:

由于可逆计算需要在整个计算过程中保存所有信息,这意味着必须纠正由于信息携带系统与不受控制的自由度的相互作用而出现的所有错误。但是,这只能以增加环境的熵为代价,而熵的增加对应于系统能量的“噪声”部分以热的形式的耗散。本文给出了该能量以有效噪声温度表示的表达式,并分析了能量耗散率与计算速度之间的关系。最后,提出了基于有效温度概念的广义克劳修斯原理。

英文摘要:

Since 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 paper 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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