analysis: connected correlations
The analysis program cov_eq
computes a subtraction of the "disconnected" part of the correlations here
do no = 1,norb
do no1 = 1,Norb
bins(m,nb-n_skip)%el(no,no1) = bins(m,nb-n_skip)%el(no,no1) - &
& cmplx(dble(Latt%N),0.d0,kind(0.d0))*Bins0(nb-n_skip,no)*Bins0(nb-n_skip,no1) &
& /Phase(nb-n_skip)
enddo
enddo
This subtraction is done on each bin read on the input file, then later the jackknife bins (i.e., everything except 1 bin of MC data) are computed from bins
, and the error is computed as usual.
This is not correct. One should do:
- Compute the jaccknife bins (i.e., average on all data except 1 bin) of
bins
and ofBins0
, separately - Do the subtraction on each jackknife bin
- Compute the standard jackknife formula
Edited by Francesco Parisen Toldin