Charles H. Bennett (computer scientist)

Charles Henry Bennett ( born 1943 ) is an American physicist and computer scientist. He is one of the discoverers of quantum teleportation.

Life and work

Bennett was the son of two music teachers. He graduated from Brandeis University with a bachelor's degree in chemistry in 1964 and in 1970 at Harvard University under David Turnbull and Bernie Alder his doctorate with a thesis on the molecular dynamics. As a post - graduate student, he worked at Aneesur Rahman at Argonne National Laboratory. From 1972, he worked at IBM in research. Bennett is an IBM Fellow and works at the IBM Thomas J. Watson Research Center. 1983 to 1985 he was a visiting professor of computer science at Boston University.

He conducted research in particular on the relationship between physics and information and, more recently, especially in the field of quantum information processing ( quantum cryptography ).

In 1973, he was building on the work of Rolf Landauer (1961 ), that a universal computer is possible, which operates thermodynamically reversible ( and this also needs to be logically reversible), ie does not generate (or arbitrarily small ) entropy. In 1982, he suggested a reinterpretation of Maxwell's demon in front of whose principal failure to break the second law does not exist under Bennett at the cost of obtaining information, but in the cost of destruction of information.

With Gilles Brassard he hit 1984 after the two named BB84 protocol for quantum key exchange, the first in such procedures. He demonstrated the practicability 1989 John A. Smolin

In 1993, he discovered with Brassard and other quantum teleportation. With Smolin, Wootters, DiVincenzo and others, he developed from 1995 to 1997, the theory of quantum entanglement ( entanglement ) quantitatively and developed methods of information transmission via classical and quantum noisy channels.

He also dealt with algorithmic information theory and defined an inner complexity (logical depth) physical conditions than the time required by a universal computer to create the state from a random initial state.

He is a Fellow of the National Academy of Sciences and the American Physical Society.

He is married and has three children. His hobbies are photography and music.