Spontaneous Symmetry Breaking in Finite Systems.

The orthodox characterization of spontaneous symmetry breaking (SSB) in statistical mechanics appeals to novel properties of systems with infinite degrees of freedom, namely, the existence of multiple equilibrium states. This raises the same puzzles about the status of the thermodynamic limit fuelin...

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Bibliographic Details
Published in:Philosophy of Science Vol. 83; no. 4; pp. 585 - 606
Main Author: Fraser, James D.
Format: Article
Published: Cambridge University Press Oct2016
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Online Access:View this record in EBSCOhost
Description
Summary:The orthodox characterization of spontaneous symmetry breaking (SSB) in statistical mechanics appeals to novel properties of systems with infinite degrees of freedom, namely, the existence of multiple equilibrium states. This raises the same puzzles about the status of the thermodynamic limit fueling recent debates about phase transitions. I argue that there are prospects of explaining the success of the standard approach to SSB in terms of the properties of large finite systems. Consequently, despite initial appearances, the need to account for SSB phenomena does not offer decisive support to claims about the explanatory and representational indispensability of the thermodynamic limit.