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cond-mat.str-el2018
Controllable Precision of the Projective Truncation Approximation for Green's Functions
Peng Fan, Ning-Hua Tong
Recently, we developed the projective truncation approximation for the equation of motion of two-time Green's functions (P. Fan et al., Phys. Rev. B 97, 165140 (2018)). In that app…
cond-mat.str-el2018
Projective Truncation Approximation for Equations of Motion of Two-Time Green's Functions
Peng Fan, Ke Yang, Kou-Han Ma +1
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 an…