Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-01-20
J. Phys.: Condens. Matter 17 (2005) S2405-S2428.
Physics
Condensed Matter
Statistical Mechanics
Scientific paper
10.1088/0953-8984/17/24/003
In this paper we discuss whether thermodynamical concepts and in particular the notion of temperature could be relevant for the dynamics of granular systems. We briefly review how a temperature-like quantity can be defined and measured in granular media in very different regimes, namely the glassy-like, the liquid-like and the granular gas. The common denominator will be given by the Fluctuation-Dissipation Theorem, whose validity is explored by means of both numerical and experimental techniques. It turns out that, although a definition of a temperature is possible in all cases, its interpretation is far from being obvious. We discuss the possible perspectives both from the theoretical and, more importantly, from the experimental point of view.
Baldassarri Andrea
Barrat Alain
D'Anna G.
Loreto Vittorio
Mayor P.
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