Bose Einstein Condensates
We now turn to the condensate phase of ultra-cold matter. It is known that condensation in cold atomic clouds occurs when the cooling lasers are switched off and for this reason the atom-atom interactions associated with an exchange of scattered photons are no longer present. What remains is short range atom collisions, which are responsible for the occurrence of a new type of mean field potential. Even in a dilute gas, where the collision frequency is very low, this mean field potential is very a important ingredient of the condensate physics, as shown in the next chapters.
KeywordsDensity Profile Lower Energy State Gross Pitaevskii Equation Gross Pitaevskii Condensed Atom
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