Classification of phase transitions in small systems

P. Borrmann, O. Mülken, J.D.R. Harting

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    We present a classification scheme for phase transitions in finite systems like atomic and molecular clusters based on the Lee-Yang zeros in the complex temperature plane. In the limit of infinite particle numbers the scheme reduces to the Ehrenfest definition of phase transitions and gives the right critical indices. We apply this classification scheme to Bose-Einstein condensates in a harmonic trap as an example of a higher order phase transition in a finite system and to small Ar clusters. © 2000 The American Physical Society
    Original languageEnglish
    Pages (from-to)3511-3514
    JournalPhysical Review Letters
    Issue number16
    Publication statusPublished - 2000


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