Cohen-Tannoudji, Claude

▪ French physicist
born April 1, 1933, Constantine, Alg.

      French physicist who shared the Nobel Prize for Physics in 1997 with Steven Chu and William D. Phillips. They received the award for their development of techniques that use laser light to cool atoms (atom) to extremely low temperatures. At such temperatures the atoms move slowly enough to be examined in detail.

      Cohen-Tannoudji was educated at the École Normale Supérieure (ENS), Paris, receiving his doctorate in 1962. After graduating he continued to work as a research scientist in the department of physics at ENS, while also teaching at the University of Paris VI from 1964 to 1973 and at the College of France from 1973.

      Cohen-Tannoudji and his colleagues at ENS expanded on the work of Chu and Phillips, successfully explaining a seeming discrepancy in theory and devising new mechanisms for cooling and trapping atoms with laser light. In 1995 they cooled helium atoms to within eighteen-millionths of a degree above absolute zero (−273.15° C, or −459.67° F), with a corresponding speed of about two centimetres per second. Their work, and that of Chu and Phillips, furthered scientists' understanding of how light and matter interact. Among other practical applications, the techniques they developed can be used to construct atomic clocks and other instruments capable of an extremely high degree of precision.

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Universalium. 2010.

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  • COHEN-TANNOUDJI, CLAUDE — (1933– ), French physicist. Cohen Tannoudji completed his Ph.D. in 1962 at the Ecole Normale Supérieure in Paris. He was then professor at the University of Paris in 1964–73, and from 1973 professor of Atomic and Molecular Physics at the Collège… …   Encyclopedia of Judaism

  • Cohen-Tannoudji, Claude — ► (n. 1933) Físico francés de origen argelino. Fue premio Nobel de Física 1997 conjuntamente con W.D. Phillips y S. Chu, por el desarrollo de un método para enfriar y atrapar átomos mediante rayo láser …   Enciclopedia Universal

  • Cohen-Tannoudji, Claude —  (1933–) French physicist, born in Algeria; awarded Nobel Prize for Physics (1997) …   Bryson’s dictionary for writers and editors

  • Cohen-Tannoudji — Cohen Tannoudji, Claude …   Enciclopedia Universal

  • Claude Cohen-Tannoudji — Born April 1, 1933 …   Wikipedia

  • Claude Cohen-Tannoudji — Claude Cohen Tannoudji. Claude Cohen Tannoudji (Constantina, Argelia, 1 de abril de 1933) físico franco argelino de origen sefardí que trabaja en la École Normale Supérieure de París, donde también estudió. Recibió en 1997 junto a Steven Chu y …   Wikipedia Español

  • Cohen-Tannoudji — Claude Cohen Tannoudji. Claude Cohen Tannoudji (* 1. April 1933 in Constantine, Algerien) ist ein französischer Physiker. Für das Kühlen und Einfangen von Atomen mit Laserlicht erhielt er zusammen mit Steven Chu und William D. Phillips 1997 den… …   Deutsch Wikipedia

  • Claude Cohen-Tannoudji — Claude Cohen Tannoudji. Claude Cohen Tannoudji (* 1. April 1933 in Constantine, Algerien) ist ein französischer Physiker. Für das Kühlen und Einfangen von Atomen mit Laserlicht erhielt er zusammen mit Steven Chu und William D. Phillips 1997 den …   Deutsch Wikipedia

  • Claude Cohen-Tannoudji — Pour les articles homonymes, voir Cohen. Claude Cohen Tannoudji Claude Cohen Tannoudji en 2007. Naissance …   Wikipédia en Français

  • Cohen-Tannoudji —   [ko ɛn tanu dʒi], Claude, französischer Physiker, * Constantine (Algerien) 1. 4. 1933; seit 1973 Professor am Collège de France, ab 1982 Mitglied der Académie des Sciences. Für seine Experimente zur Laserkühlung erhielt Cohen Tannoudji 1997… …   Universal-Lexikon

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