Controllable precision of the projective truncation approximation for Green’s functions
Fan Peng
, Tong Ning-Hua
†
(a)
〈
n
↑
〉
and (b)
〈
n
↑
n
↓
〉
as functions of
ϵ
d
. The parameters are
U
=2.0,
T
=0.1,
δ ω
= 0.0.
