solver.ktau.in

Introduction

The solver.ktau.in is used to store the screening function $K(\tau)$ and its derivates $K'(\tau)$ in imaginary-time space. It is only useful for the NARCISSUS component.

Format

The format of the solver.ktau.in file is as follows:

column 1: imaginary-time point, $\tau$, double precision

column 2: screening function, $K(\tau)$, double precision

column 3: the first derivates of screening function, $K'(\tau)$, double precision

In principle, $K(\tau)$ and $K'(\tau)$ should be orbital-dependent. However in the NARCISSUS component, for the sake of simplicity, we treat them as orbital-independent vectors.

Code

The corresponding Fortran code block for the reading of solver.ktau.in file is as follows:

open(mytmp, file='solver.ktau.in', form='formatted', status='unknown')
read(mytmp,*) ! skip one line
do i=1,ntime
    read(mytmp,*) rtmp, ktau(i), ptau(i)
enddo ! over i={1,ntime} loop
close(mytmp)

For some typical models, the solver.ktau.in file can be generated using the toolbox/makescr tool which is included in the HIBISCUS component. See toolbox/makescr for more details.