# Reproducibility: Figure 2a – Hydrogen Atom Analog

This script reproduces Figure 2a from the paper:
> “REACS-DI: Redefining Entropic Action in Cosmological Structure”  
> [Author Name], 2025

## How to Run

Run the script using:

```bash
python fig_2a_hydrogen_analog.py
```

### Requirements:
- numpy
- matplotlib
- scipy

Install dependencies using:

```bash
pip install -r requirements.txt
```

### Output
The output is a 3D surface plot showing a Gaussian density distribution representing a scaled hydrogen atom analog, as described in the manuscript. It features:
- A nucleus marker (cyan dot)
- Properly labeled axes: X (meters), Y (meters), Density
- Plasma colormap for the electron cloud

## Notes
- This is a 2D slice through the Z plane of a 3D Gaussian density function.
- Adjust `filament_radius` and `void_radius` in the script to match manuscript settings.