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Bose-Einstein condensate  

Définition

  • In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero (−273.15 °C or −459.67 °F). Under such conditions, a large fraction of bosons occupy the lowest quantum state, at which point microscopic quantum mechanical phenomena, particularly wavefunction interference, become apparent macroscopically. A BEC is formed by cooling a gas of extremely low density (about 100,000 times less dense than normal air) to ultra-low temperatures. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_condensate)

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http://data.loterre.fr/ark:/67375/MDL-RSPXL3FZ-K

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