Abstract
The thermally weighted average end-to-end distance (RN) of interacting self-avoiding walks (SAWs) are obtained enumerating all the (finite) N-stepped SAW configurations on the infinite percolation cluster of bond diluted square lattice at the percolation threshold. Averaging over 250 percolation clusters and enumerating all the possible SAWs on them for N up to 31, (RN) is fitted to a scaling form (R2N) approximately N2 nu theta f(Nphi tau )=(T-theta )/theta is the temperature interval away from the theta -point, phi is the crossover exponent and nu theta is the tricritical size exponent. The best fit is obtained for theta approximately=0.71 (compared to theta 0 approximately=1.54 on a pure square lattice), nu approximately=0.74 (compared to nu theta phi =4 mod 7 approximately=0.57 in two dimensions) and phi approximately=0.20. They also obtain an estimate for of SAW size exponent nu C for collapsed phase on the percolation cluster.
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