TERRANOVA guillermo Roberto
Effects of length fluctuations on the viscosity exponent in the necklace model
C. M. ALDAO; G. R. TERRANOVA; H. O. MÁRTIN
JOURNAL OF PHYSICS. A - MATHEMATICAL AND GENERAL
Año: 2009 vol. 42 p. 165005 - 165005
It is commonly accepted that contour length fluctuations increase the viscosityexponent for chains that diffuse by reptation. We found that length fluctuationsin the necklace model can play an unexpected role as they can also decrease thisexponent. A detailed analysis of the interplay between the discrete characterof the model and how the fluctuations take place is presented in this work.Basically, we found that when fluctuations are symmetric their influence is theexpected one; when fluctuations are not symmetric new effects can appear.