Charles H. Bennett (computer scientist)
| Charles H. Bennett | |
|---|---|
| Born | 1943 (age 73–74) |
| Fields |
computer science quantum information |
| Institutions | Thomas J. Watson Research Center |
| Alma mater |
Brandeis University (BS 1964) Harvard University (PhD 1970) |
| Doctoral advisor |
David Turnbull Berni Alder |
| Known for | Bennett's four laws of quantum information |
| Notable awards | IBM Fellow |
|
Website www |
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Charles Henry Bennett (b. 1943) is a physicist, information theorist and IBM Fellow at IBM Research. Bennett's recent work at IBM has concentrated on a re-examination of the physical basis of information, applying quantum physics to the problems surrounding information exchange. He has played a major role in elucidating the interconnections between physics and information, particularly in the realm of quantum computation, but also in cellular automata and reversible computing. He discovered, with Gilles Brassard, the concept of quantum cryptography and is one of the founding fathers of modern quantum information theory (cf. Bennett's four laws of quantum information).
Born in 1943 in New York City, Bennett earned a B.S. in Chemistry from Brandeis University in 1964, and received his PhD from Harvard in 1970 for molecular dynamics studies (computer simulation of molecular motion) under David Turnbull and Berni Alder. At Harvard, he also worked for James Watson one year as a teaching assistant about the genetic code. For the next two years he continued this research under the late Aneesur Rahman at Argonne Laboratory.
After joining IBM Research in 1972, he built on the work of IBM's Rolf Landauer to show that general-purpose computation can be performed by a logically and thermodynamically reversible apparatus; and in 1982 he proposed a re-interpretation of Maxwell's demon, attributing its inability to break the second law to the thermodynamic cost of destroying, rather than acquiring, information. He also published an important paper on the estimation of free energy differences between two systems, the Bennett acceptance ratio method.
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