Phase Coexistence in Finite Systems | Zendy

Philippe Chomaz | Zendy; F. Gulminelli | Zendy

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Phase Coexistence in Finite Systems

Author(s) -

Philippe Chomaz,

F. Gulminelli

Publication year - 2002

Publication title -

progress of theoretical physics supplement

Language(s) - English

Resource type - Journals

ISSN - 0375-9687

DOI - 10.1143/ptps.146.135

Subject(s) - bimodality , observable , curvature , statistical physics , phase transition , anomaly (physics) , partition (number theory) , phase space , physics , distribution (mathematics) , mathematics , mathematical analysis , quantum mechanics , combinatorics , geometry , galaxy

We define a first order phase transition as a bimodality of the event distribution in the space of observations and we show that this is equivalent to a curvature anomaly of the thermodynamical potential and that it implies the Yang Lee behavior of the zeros of the partition sum. We propose partial energy fluctuations as a directly measurable observable of such a phenomenon in Gibbs as well as Tsallis equilibria.

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