Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model

Details Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model

2000-05-09

arxiv.org/abs/cond-mat/0005160v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.62.7905

It is shown that the fraction f of imaginary frequency instantaneous normal modes (INM) may be defined and calculated in a random energy model(REM) of liquids. The configurational entropy S and the averaged hopping rate among the states R are also obtained and related to f, with the results R~f and S=a+b*ln(f). The proportionality between R and f is the basis of existing INM theories of diffusion, so the REM further confirms their validity. A link to S opens new avenues for introducing INM into dynamical theories. Liquid 'states' are usually defined by assigning a configuration to the minimum to which it will drain, but the REM naturally treats saddle-barriers on the same footing as minima, which may be a better mapping of the continuum of configurations to discrete states. Requirements of a detailed REM description of liquids are discussed.

Affiliated with

Also associated with

No associations

Rating

Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model 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 Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entropy, Dynamics and Instantaneous Normal Modes in a Random Energy Model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-214429