Coexistence of solutions in dynamical mean-field theory of the Mott transition

Article

关键词: INFINITE DIMENSIONS;    HUBBARD-MODEL;    FERMIONS;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.62.6860

来源: SCIE

【 摘 要 】

In this paper, I discuss the finite-temperature metal-insulator transition of the paramagnetic Hubbard model within dynamical mean-field theory. I show that coexisting solutions, the hallmark of such a transition, can be obtained in a consistent way both from quantum Monte Carlo (QMC) simulations and rom the exact diagonalization method. I pay special attention to discretization errors within the QMC method. These errors explain why it is difficult to obtain the solutions from the QMC method close to the boundaries of the coexistence region.

【 授权许可】

Free