Quantum limits to the flow of information and entropy
John Brian Pendry · Journal of Physics A Mathematical and General · 1983
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 <or=E pi /(3h(cross)ln 2 2) a relationship which, though speculated on before or derived for only a restricted class of systems, is proven 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