Block SS-CAA: A complex moment-based parallel nonlinear eigensolver using the block communication-avoiding Arnoldi procedure

Complex moment-based parallel eigensolvers have been actively studied owing to their high parallel efficiency. In this paper, we propose a block SS-CAA method, which is a complex moment-based parallel nonlinear eigensolver that makes use of the block communication-avoiding Arnoldi procedure. Numerical experiments indicate that the proposed method has higher performance compared with traditional complex moment-based nonlinear eigensolvers, i.e., the block SS-Hankel and Beyn methods.