Minimal energy requirements in communication

被引:113
作者
Landauer, R
机构
[1] IBM Thomas J. Watson Research Center, Yorktown Heights
关键词
D O I
10.1126/science.272.5270.1914
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The literature describing the energy needs for a communications channel has been dominated by analyses of linear electromagnetic transmission, often without awareness that this is a special case. This case leads to the conclusion that an amount of energy equal to kTln 2, where kT is the thermal noise per unit bandwidth, is needed to transmit a bit, and more if quantized channels are used with photon energies h nu > kT: Alternative communication methods are proposed to show that there is no unavoidable minimal energy requirement per transmitted bit. These methods are Invoked as part of analysis of ultimate limits and not as practical procedures.
引用
收藏
页码:1914 / 1918
页数:5
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