Euclidean random matrices, the glass transition and the Boson peak

Details Euclidean random matrices, the glass transition and the Boson peak Euclidean random matrices, the glass transition and the Boson peak

2003-01-16

arxiv.org/abs/cond-mat/0301282v1

Physics

Condensed Matter

Soft Condensed Matter

proceeding of the Messina conference in honour of Gene Stanley, Physica A in press

Scientific paper

In this paper I will describe some results that have been recently obtained in the study of random Euclidean matrices, i.e. matrices that are functions of random points in Euclidean space. In the case of translation invariant matrices one generically finds a phase transition between a phonon phase and a saddle phase. If we apply these considerations to the study of the Hessian of the Hamiltonian of the particles of a fluid, we find that this phonon-saddle transition corresponds to the dynamical phase transition in glasses, that has been studied in the framework of the mode coupling approximation. The Boson peak observed in glasses at low temperature is a remanent of this transition.

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