Directed polymers and Randomness
arXiv:cond-mat/0505283
Abstract
The effects of two types of randomness on the behaviour of directed polymers are discussed in this chapter. The first part deals with the effect of randomness in medium so that a directed polymer feels a random external potential. The second part deals with the RANI model of two directed polymers with heterogeneity along the chain such that the interaction is random. The random medium problem is better understood compared to the RANI model.
49 pages; To appear in "Statistics of Linear Polymers in Disordered Media", ed. by B.K. Chakrabarti, Elsevier 2005