1305.0207 (S. -X. Yang et al.)

Mean-field embedding of the dual fermion approach for correlated
electron systems    [PDF]

S. -X. Yang, H. Terletska, Z. Y. Meng, J. Moreno, M. Jarrell

To reduce the rapidly growing computational cost of the dual fermion lattice calculation with increasing system size, we introduce two embedding schemes. One is the real fermion embedding, and the other is the dual fermion embedding. Our numerical tests show the real fermion and dual fermion embedding approaches converge to essentially the same result. The application on the Anderson model shows that these embedding algorithms converge more quickly with system size as compared to the conventional dual fermion method, for the calculation of both one-particle and two-particle quantities.

View original: http://arxiv.org/abs/1305.0207