In this work we analyze the finite-size and discretization effects that occur in field-theoretic polymer simulations.Following our previous work,we study these effects for a polymer solution in the canonical ensemble confined to a slit(with nonadsorbing walls)of width L,and focus on the behavior of two quantities:the chemical potential mu,and the correlation length zeta.Our results show that the finite-size effects disappear for both quantities once the lateral size of the system L is larger than ~2zeta.On the other hand,the chemical potential is dominated by the lattice discretization DELTA x.The origins of this dependence are discussed in detail,and a scheme is proposed in which this effect is avoided.Our results also show that the density profiles do not depend on the lattice discretization if DELTAx approx. 2zeta and DELTA xapprox.展开▼
