Mean-field embedding of the dual-fermion approach for correlated electron systems.
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 that the real fermion and dual-fermion embedding approaches converge to essentially the same result. The application on the Anderson disorder and Hubbard models shows that these embedding algorithms converge more quickly with system size as compared to the conventional dual-fermion method, for the calculation of both single- and two-particle quantities.
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA and Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
S-X
SX
Yang
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
H
H
Terletska
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA and Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Z Y
ZY
Meng
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA and Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
J
J
Moreno
Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA and Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
M
M
Jarrell