Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators

Details Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators

2000-09-27

arxiv.org/abs/cond-mat/0009428v2

Eur.Phys.J.B, vol.20, 105 (2001).

Physics

Condensed Matter

Disordered Systems and Neural Networks

23 pages, REVTeX, 4 eps figures

Scientific paper

In order to describe the thermodynamics of the glassy systems it has been recently introduced an extra parameter also called effective temperature which generalizes the fluctuation-dissipation theorem (FDT) to systems off-equilibrium and supposedly describes thermal fluctuations around the aging state. Here we investigate the applicability of a zero-th law for non-equilibrium glassy systems based on these effective temperatures by studying two coupled subsystems of harmonic oscillators with Monte Carlo dynamics. We analyze in detail two types of dynamics: 1) sequential dynamics where the coupling between the subsystems comes only from the Hamiltonian and 2) parallel dynamics where there is a further coupling between the subsystems arising from the dynamics. We show that the coupling described in the first case is not enough to make asymptotically the effective temperatures of two interacting subsystems coincide, the reason being the too small thermal conductivity between them in the aging state. This explains why different interacting degrees of freedom in structural glasses may stay at different effective temperatures without never mutually thermalizing.

Affiliated with

Also associated with

No associations

Rating

Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Validity of the zero-thermodynamic law in off-equilibrium coupled harmonic oscillators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-631529