Statistics of quenched defects containing semi-flexible polymer chain: exact results (II)

Method to discuss thermodynamics of a defected semi-flexible homo-polymer chain in the two and three dimensions using fully directed self-avoiding walk lattice model has been described here. The defects are located along a line and these defects are not in the thermal equilibrium with the monomers of the semi-flexible polymer chain; i.e. the case of defected semi-flexible polymer chain has been considered here in the present manuscript for the case of quenched defects. There are m defects on the conformations of the N monomers long semi-flexible polymer chain and the number of Q realizations of the defected conformations of N-monomers long self-avoiding semi-flexible polymer chain have been counted exactly; thus the exact expression of the free energy of the defected semi-flexible polymer chain for the finite length has been derived (i.e. using the fixed particle ensemble method); and exact expression of the partition function for the defected self-avoiding semi-flexible polymer chain in the thermodynamic limit using the grand canonical ensemble theory has been derived. The method described in this manuscript may be easily extended to another case of the defected polymer chain for isotropic/directed walk lattice models