Postal address
Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India.
Secretariat phones
+91-22-2278 2244 +91-22-2278 2156
+91-22-2278 2777 +91-22-2280 4611 +91-22-2280 4610
Secretariat email
"theophys" The mailhost for DTP is

Please write to cmspjc at theory dot tifr dot res dot in for getting email announcements and any suggestions regarding CMSP Journal Club.

Condensed Matter and Statistical Physics Journal Club

Talk Details

Title Dynamics of non-conservative voters
Speaker V. Sasidevan
Date Wed, 19 Jan 2011
Time 14:30
Venue A 304


I will discuss two models of opinion dynamics. The first one is a non-conservative voter model in 1D where the propensity of a voter to align with its local environment depends non-linearly on the fraction of disagreeing neighbors. Depending on this non-linearity in the voting rule, the population may exhibit a bias toward zero magnetization or toward consensus, and the average magnetization is generally not conserved. The second model which is a non-consensus voter model is more realistic in the sense that it allows for stable coexistence of two opinions by forming clusters of voters holding the same opinion. The model displays a phase transition behavior characterized by a large spanning cluster of voters holding the same opinion appearing when the concentration of voters holding the same opinion (even minority) is above a certain threshold. Simulation studies suggest that the model belong to the same universality class as invasion percolation.


Dynamics of non-conservative voters , R. Lambiotte and S. Redner, EPL, 82 (2008) 18007

Dynamic opinion model and invasion percolation, J. Shao, S. Havlin and H. E. Stanley PRL, 103, 018701 (2009)