Mobility edge and locality of the overlap-Dirac operator with and   without dynamical overlap fermions
  We perform a systematic study of low-lying eigenmodes of $H_w$ with various gauge actions to find the optimal choice for dynamical overlap fermion simulations, with which one may achieve lower numerical cost for HMC and better locality property of the overlap kernel. For this purpose, our study is made with emphasis on the distribution of low-lying eigenvalues and the mobility edge with and without dynamical overlap fermions. 
JLQCD Collaboration: N. Yamada, S. Aoki, H. Fukaya, S. Hashimoto, K-I.   Ishikawa, K. Kanaya, T. Kaneko, H. Matsufuru, M. Ok...