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Stories by Charles H. Bennett

The Fundamental Physical Limits of Computation

What constraints govern the physical process of computing? Is a minimum amount of energy required, for example, per logic step? There seems to be no minimum, but some other questions are open...

June 1, 2011 — Charles H. Bennett and Rolf Landauer

Quantum Cryptography

For ages, mathematicians have searched for a system that would allow two people to exchange messages in absolute secrecy. Quantum mechanics has now joined forces with cryptology to achieve a major step in that direction...

October 1, 1992 — Charles H. Bennett, Gilles Brassard and Artur K. Ekert

Demons, Engines and the Second Law

Since 1871 physicists have been trying to resolve the conundrum of Maxwell's demon: a creature that seems to violate the second law of thermodynamics. An answer comes from the theory of computing...

November 1, 1987 — Charles H. Bennett

The Fundamental Physical Limits of Computation

What constraints govern the physical process of computing? Is a minimum amount of energy required, for example, per logic step? There seems to be no minimum, but some other questions are open...

July 1, 1985 — Charles H. Bennett and Rolf Landauer
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Lifestyle Changes. Lifetime Benefits.

Lifestyle Changes. Lifetime Benefits.

A New Outlook for Old Age