Thermodynamic cost of reversible computing

Details Thermodynamic cost of reversible computing Thermodynamic cost of reversible computing

2007-01-31

arxiv.org/abs/quant-ph/0701237v2

Physics

Quantum Physics

5 pages; added two paragraphs and fixed a number of typos

Scientific paper

10.1103/PhysRevLett.99.110502

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.

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