# Ground-state 1D Hubbard chain example (U=16)

This folder contains one complete example calculation from:
- `sweep_20261105_005551/L12_Nup6_Ndn6_U16.0`

## Model and sector
- Model: `1_orb_Hubbard_chain`
- Geometry mode: `LongRange`
- Chain length: `L = 12`
- Filling/sector: `Nup = 6`, `Ndown = 6`
- Interaction: `U = 16` on all sites

## Exact input file
- `input_1orbHubbard_LongRange.inp`

## Input data files used by the input
- `Hopping_L12_chain_PBC.txt`
- `Local_U.txt`
- `ZeroMatrix_L12.txt`
- `ThreePointOprs_zero.txt`
- `ThreePointIntrs_zero.txt`

## Included outputs
- `Sq_from_fullSS.txt` (static spin structure factor from full `S·S = SzSz + 0.5(SpSm+SmSp)`)
- `Sq_from_SzSz.txt` (SzSz-only structure factor)
- `Tri_evals_OBC_GC.txt` (Lanczos tridiagonal eig spectrum output file)
- `run_out.txt` (run log)

## PDF plot example
- `Sq_U16_fullSS.pdf` is generated from `Sq_from_fullSS.txt`
- Gnuplot script: `plot_Sq_U16_export.gp`

To regenerate the PDF in this folder:
```bash
gnuplot plot_Sq_U16_export.gp
```