Parallel exact diagonalization solver for quantum-electron models

Abstract

We present a parallel computation scheme based on the Arnoldi algorithm for exact diagonalization of quantum-electron models. It contains a selective data transferring method and distributed storage format for efficient computing of the matrix-vector product on distributed computing systems. The performed numerical experiments demonstrated good performance and scalability of our eigenvalue solver. The developed technique has been applied to investigate the electronic properties of Sr2RuO4 at experimental temperatures. The role of the spin-flip term in the electronic Hamiltonian was analyzed.

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