NBodyG.dat

This file contains the generic N-body Green’s functions specified by the NBodyG input file. A line with \(N\) factors stores

(4.32)\[\left\langle \prod_{p=1}^{N} c_{i_p\sigma'_p}^{\dagger} c_{j_p\sigma_p} \right\rangle .\]

An example of the file format is as follows.

1    0    0    1    0 0.1250000000 0.0000000000
2    0    0    0    0    1    1    1    1 0.2500000000 0.0000000000
3    0    0    0    0    1    1    1    1    2    0    2    0 0.0312500000 0.0000000000

File name

  • Lanczos method: ##_NBodyG.dat

  • TPQ method: ##_NBodyG_set??step%%.dat

  • TPQ/cTPQ method with OutputGreenFormat=1: ##_NBodyG_tpq.dat

  • Full diagonalization method, LOBCG method: ##_NBodyG_eigen&&.dat

  • Full diagonalization method, LOBCG method with OutputGreenFormat=1: ##_NBodyG_eigen.dat

  • Real time evolution method: ##_NBodyG_step%%.dat

  • Real time evolution method with OutputGreenFormat=1: ##_NBodyG_te.dat

##, ??, %%, and && indicate [string02] in a ModPara file, the number of runs in calculation in the TPQ method, the number of steps in the TPQ or real-time evolution method, and the index of the eigenvalues, respectively. In aggregate files, each data row has leading index columns: set step for TPQ/cTPQ, step for real-time evolution, and eigen for Full diagonalization/LOBCG.

File format

  • [int01] ([int02] [int03] [int04] [int05]) … [double01] [double02]. The group in parentheses is repeated [int01] times.

For aggregate files generated with OutputGreenFormat=1, the same columns are preceded by set step, step, or eigen according to the calculation method.

Parameters

  • [int01]

    Type : Int

    Description : The number of factors \(N\) in this component.

  • [int02], [int04] of each factor

    Type : Int

    Description : Site indices. [int02] and [int04] show \(i_p\) and \(j_p\), respectively.

  • [int03], [int05] of each factor

    Type : Int

    Description : Spin or local-state indices.
    For Hubbard, tJ, Kondo, and their GC/NConserved variants:
    0: Up-spin
    1: Down-spin.
    For SpinlessFermion/SpinlessFermionGC, only 0 is output.

  • [double01], [double02]

    Type : Double

    Description : The value of the specified generic N-body Green’s function.
    [double01] and [double02] show the real and imaginary parts, respectively.