solver.sfom.dat

Introduction

The solver.sfom.dat file is used to store the spin-spin correlation function in frequency space, $\chi_{\text{spin}}(i\nu_n)$. It will be output by the quantum impurity solvers when they are shut down.

Format

The solver.sfom.dat file contains nband blocks. Each block is appended by two blank lines. The format of each block is as follows:

column 1: Matsubara frequency point (bosonic type), $\nu_n$, double precision

column 2: spin-spin correlation function, $\Re \chi_{\text{spin}}(i\nu_n)$, double precision

column 3: error bar, $\Re [\delta\chi_{\text{spin}}(i\nu_n)]$, double precision

Code

The corresponding Fortran code block for the writing of solver.sfom.dat file is as follows:

! open data file: solver.sfom.dat
     open(mytmp, file='solver.sfom.dat', form='formatted', status='unknown')

! write it
     do j=1,nband
         write(mytmp,'(a,i6)') '# flvr:', j
         do i=1,nbfrq
             write(mytmp,'(3f12.6)') bmesh(i), ssfom(i,j), sserr(i,j)
         enddo ! over i={1,nbfrq} loop
         write(mytmp,*) ! write empty lines
         write(mytmp,*)
     enddo ! over j={1,nband} loop

! close data file
     close(mytmp)

In the HIBISCUS component, we provide a Python module to read the output files of quantum impurity solvers. You can use it to read the solver.sfom.dat file. See script/u_reader.py for more details.