Low-lying Eigenvalues of the improved Wilson-Dirac Operator in QCD
  The spectral flow of the low-lying eigenvalues of the improved and unimproved Wilson-Dirac operator is studied on instanton-like configurations and on thermalized quenched configurations at various $\beta$-values and lattice sizes. We also investigate the space-time localisation and chirality of the corresponding eigenvectors. 
Hubert Simma, Douglas Smith (UKQCD Collaboration)