INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
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 regularly accepted that contour length fluctuations increase the viscosity exponent for chains that diffuse by reptation. We found that length fluctuations in the necklace model can play an unexpected role decreasing the value of this exponent. A detailed analysis of the interplay between the discrete character of the model and how the fluctuations take place is presented in this work. Basically, we found that, when fluctuations are symmetric their influence is the expected one; when fluctuations are not symmetric new effects can appear.