Energy barriers, demons, and minimum energy operation of electronic devices

被引:41
作者
Cavin, RK [1 ]
Zhirnov, VV
Hutchby, JA
Bourianoff, GI
机构
[1] Semicond Res Corp, Res Triangle Pk, NC 27709 USA
[2] Intel Corp, Austin, TX 78746 USA
来源
FLUCTUATION AND NOISE LETTERS | 2005年 / 5卷 / 04期
关键词
binary switch; energy barrier; reversible computing; adiabatic switching; Maxwell's demon;
D O I
10.1142/S0219477505002951
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The presence of thermal noise dictates that an energy barrier is needed to preserve a binary state. Therefore, all electronic devices contain at least one energy barrier to control electron flow. The barrier properties determine the operating characteristics of electronic devices. Furthermore, changes in the barrier shape require changes in charge density. Operation of all charge transport devices includes charging/discharging capacitances to change barrier height. We analyze energy dissipation for several schemes of charging capacitors. A basic assumption of Reversible Computing is that the computing system is completely isolated from the thermal bath. An isolated system is a mathematical abstraction never perfectly realized in practice. Errors due to thermal excitations are equivalent to information erasure, and thus computation dissipates energy. Another source of energy dissipation is due to the need of measurement and control. To analyze this side of the problem, the Maxwell's Demon is a useful abstraction. We hold that apparent "energy savings" in models of adiabatic circuits result from neglecting the total energy needed by other parts of the system to implement the circuit.
引用
收藏
页码:C29 / C38
页数:10
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