Quantum limits to the flow of information and entropy 论文

详细信息

发表期刊/会议

Journal of Physics A Mathematical and General

发表日期

1983-07-11

发表年份

1983

摘要

Abstract. The quantum limits to information flow are explored developing the central concept of a medium comprising several channels through which the information flows. In each channel there is an inequality between information flow i and energy flow E i 2 < E ' r r / ( 3 h ~ n 2 2) a relationship which, though speculated on before or derived for only a restricted class of systems, is proven here for a wide range of systems. Applications are made to the energy cost of computing and to the maximum rate of cooling, Q, which in any one channel is Q S l r k i T 2 / ( 3 h). 1. The medium is the message When information is signalled from one place to another it must be conveyed by some medium. Despite information being an abstract concept, when we come to process it there is always a specific context: a flow of electric current, radio waves, light waves or sound waves, Identifying information with entropy (Shannon 1948, Brillouin 1956), there is an analogy to be made between a medium carrying information and a fluid