  We map the conformation space of a simple lattice polymer chain to a network,
where (i) the vertices of the network have a one-to-one correspondence to the
conformations of the chain, and (ii) a link between two vertices indicates the
possibility of switching from one conformation to the other by a single Monte
Carlo move of the chain. We find that the geometric properties of this network
are similar to those of small-world networks, namely, the diameter of
conformation space increases, for large networks, as the logarithm of the
number of conformations, while locally the network appears to have low
dimensionality.
