escolaas-sp08-aulaiifep.if.usp.br/~mmartine/transparencias/12_2_bagnato.pdf · phase 8 -iheo ooss...
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XI Escola de Verão Jorge André Swieca deÓptica Quântica e Óptica Não Linear11 a 22 de fevereiro de 2008, IFUSP, São Paulo, SP
- TUTORIAL-
Fundaments of
Bose-Einstein condensation
V.S.Bagnato
ISFC/USP
T > Tc T < T
cT << T
c
Aula II
Classification of the phase transition:
Ehrenfest classification: Based on the thermodynamics
“The phase transition is of n th order if at least one of the thermodynamic variables has discontinuity on the n-derivative wit h respect to temperature
�first order
Ginzburg-Landau : presence or not of discontinuity on the order parameter
���� Second order ( continuous variation of the order pa rameter )
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