Low-Lying Fermion Modes: Dynamical versus Quenched
  We compare the low-lying eigenmodes of the O(a) improved Wilson-Dirac operator on quenched and dynamical configurations and investigate methods of probing the topological properties of gauge configurations 
R. Horsley, T.G. Kovacs, V. Linke, D. Pleiter, G. Schierholz, Th.   Streuer