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pro vyhledávání: '"Kou-Han Ma"'
Publikováno v:
Physical review. E. 106(1-1)
In this paper, we first develop the projective truncation approximation (PTA) in the Green's function equation of motion (EOM) formalism for classical statistical models. To implement PTA for a given Hamiltonian, we choose a set of basis variables an
Autor:
Kou-Han Ma, Ning-Hua Tong
Publikováno v:
Physical Review B. 104
We investigate the phase diagram of spinless fermions on a square lattice with nearest-neighbor interaction, using the recently developed projective truncation approximation in Green's function equation of motion. For attractive interaction, the grou
Publikováno v:
Physical Review B. 97
In the equation of motion approach to the two-time Green's functions, conventional Tyablikov-type truncation of the chain of equations is rather arbitrary and apt to violate the analytical structure of Green's functions. Here, we propose a practical
Autor:
Ning-Hua Tong, Kou-Han Ma
Publikováno v:
Modern Physics Letters B. 33:1950332
In a previous work (N. H. Tong, Phys. Rev. B 92, 165126 (2015)), an equation-of-motion based series expansion formalism was used to do the second-order strong-coupling expansion for the single-particle Green function of the Anderson impurity model. I