Two interacting particles in a random potential
  We study the scaling of the localization length of two interacting particles in a one-dimensional random lattice with the single particle localization length. We obtain several regimes, among them one interesting weak Fock space disorder regime. In this regime we derive a weak logarithmic scaling law. Numerical data support the absence of any strong enhancement of the two particle localization length. 
Dmitry O. Krimer, Ramaz Khomeriki and Sergej Flach
cond-mat.dis-nn nlin.CD quant-ph