K. Likharev. Classical and quantum limitations on energy consumption on computation. Int'l J. Theoret. Physics, 21:311--326, 1982.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....into one of n equiprobable successors, that step can, if properly harnessed, be used to remove log 2 n bits of entropy from the computer s environment. Models have been constructed, obeying the usual conventions of classical, quantum, and thermodynamic thought experiments [16, 15, 3, 4] [11, 17, 23, 1, 10] showing both the ability in principle to perform logically reversible computations in a thermodynamically reversible fashion (i.e. with arbitrarily little entropy production) and the ability to harness entropy increases due to data randomization within a computer to reduce correspondingly the ....

K. Likharev. Classical and quantum limitations on energy consumption on computation. Int'l J. Theoret. Physics, 21:311--326, 1982.

....describe a circuit implementation of a Fredkin gate. This design requires multiple large inductors per gate, and the authors admit that the concept is not appropriate for VLSI applications. They do, however, suggest that Josephson junction based systems may provide a better platform. Likharev [Lik82] also proposed a superconducting Josephson junction based computing engine which performed energy recovery. Koller and Athas [KA92] using techniques similar to SCRL, have developed a method of driving highly capacitive wiring and gate loads while recovering the energy. Their work on power supply ....

K. K. Likharev. Classical and quantum limitations on energy consumption in computation. Innnnternational Journal of Theoretical Physics, 21(3/4):311--325, 1982.

....operation. However, this limit can be made exponentially small by operating with higher voltages or lower temperatures. Problems due to resistance will diminish as technology improves. Circuits built from exotic but existing low temperature superconducting switches, such as Josephson junctions [5], offer extremely low resistance to fast reversible changes of state, and negligible leakage effects. Moreover, even with the high resistance and measurable leakage of conventional transistors at ordinary voltages and temperatures, SCRL is still capable of much greater energy efficiencies than ....

K. K. Likharev. Classical and quantum limitations on energy consumption in computation. Int'l J. Theoretical Physics, 21(3/4):311--326, 1982.

....technologies. Some of the important work follows: Fredkin [FT78] proposed an implementation of conservative logic gates based on a technology incorporating an inductor in each gate. The lack of a plausible implementation technology prevented this approach from being taken seriously. Likharev [Lik82] proposed a superconducting Josephson Junction based computing engine which performed energy recovery using reversible techniques, and similar work was under22 taken by Goto in Japan, although the requirement for reversibility was ignored in Goto s work. In both cases, architectural details were ....

K. K. Likharev. Classical and quantum limitations on energy consumption in computation. Innnnternational Journal of Theoretical Physics, 21(3/4):311--325, 1982.

....into one of n equiprobable successors, that step can, if properly harnessed, be used to remove log 2 n bits of entropy from the computer s environment. Models have been constructed, obeying the usual conventions of classical, quantum, and thermodynamic thought experiments [16, 15, 3, 4] [11, 17, 23, 1, 10] showing both the ability in principle to perform logically reversible computations in a thermodynamically reversible fashion (i.e. with arbitrarily little entropy production) and the ability to harness entropy increases due to data randomization within a computer to reduce correspondingly the ....

K. Likharev. Classical and quantum limitations on energy consumption on computation. Int'l J. Theoret. Physics, 21:311--326, 1982.

.... for reversible copying canceling of records in [14] and Brownian computers [12] for Turing machines and Brownian enzymatic computers [3, 4, 6] with respect to reversible Boolean circuits by [9] for molecular (billiard ball) computers by [21] Brownian computing using Josephson devices in [16], quantum mechanic computers in [1, 2, 17] and notably by R. Feynman [7, 8] All these models seem mutually simulatable. For background information, see [5] In the last three decades there have been many partial precursors and isolated results to the complete mathematical theory developed in this ....

K. Likharev. Classical and quantum limitations on energy consumption on computation. Int. J. Theoret. Physics, 21:311--326, 1982.

....with varying concentrations of regulating chemicals (which could be telling the machine: start copying DNA; start destroying DNA, or whatever) and products are drained out (along with heat) will keep working if and only if bound 4E is obeyed. Besides enzymes, we mention that Likharev [likh77] [likh82] [likh85] has proposed a way to accomplish reversible computation using electrical circuits involving Josephson junctions. It seems likely that Likharev s devices could actually be built. 6 Remarks about previous work. Various calculations concerning information flux and photon channels have ....

K.K. Likharev. Classical and quantum limitations on energy consumption in computation. Int. J. Theor. Phys., 21:311--326, 1982.

.... for Turing machines and Brownian enzymatic computers [3, 4, 6] with respect to reversible Boolean circuits by [9] for molecular (billiard ball) comput 0 0 0 0 1 1 1 1 OUTPUT INPUT 0 0 1 1 0 1 1 0 Figure 3: A billiard ball computer ers by [23] Brownian computing using Josephson devices in [17], quantum mechanic computers in [1, 2, 18] and notably by R. Feynman [7, 8] All these models seem mutually simulatable. For background information, see [5] Implementations in current solid state technologies (nMOS, CMOS, CCD) of two methods of using switches to implement reversible computations ....

K. Likharev. Classical and quantum limitations on energy consumption on computation. Int'l J. Theoret. Physics, 21:311--326, 1982.

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