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This chapter discusses the properties of an ideal Bose—Einstein (BE) gas, which without any interactions nevertheless shows a remarkable phase transition, the ‘Bose—Einstein condensation’. This property is relevant to liquid 4He and to the behaviour of groups of ‘cold atoms’. But another important application of BE statistics is to the ‘phoney’ boson gases, photons and phonons.
KeywordsEinstein Condensation Cold Atom Alkali Metal Atom Condensate Fraction Massless Boson
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