reddoma742/Davisson-Germer-DTQEM: DTQEM v17.0 – Unified Wave‑Particle Simulator (Fixed Hamiltonian, Pure Dephasing)

What's new in v17.0?

This release corrects a major physical misinterpretation present in earlier versions. The observer strength E_ext now only affects the pure dephasing rate, defined by the Lindblad operator:

$$ L = \sqrt{\gamma_0 E_{ext}} \sigma_z $$

This change leaves the system's natural Hamiltonian fixed. This aligns with standard quantum measurement theory: the observer does not change the particle's energy, only destroys coherence.

Key additions

• New photon simulation model (photon_wave_particle.py) specifically tuned for red light (650 nm, approx 461 THz).
• FFT-based frequency extraction to recover the natural Rabi frequency from the time-dependent probability P(t).
• Corrected Zeno effect: At E_ext = 1.0, the system reaches a maximally mixed state (P = 0.5) with zero coherence.

Numerical validation (Photon Model)

| E_ext | P_right (50 fs) | Extracted v (THz) | v0 (Theory) | Error | | :--- | :--- | :--- | :--- | :--- | | 0.0 | 0.1090 | 458.17 | 461.22 | 0.66% | | 0.3 | 0.4963 | 318.73 | 322.85 | 1.28% | | 0.5 | 0.5004 | 239.04 | 230.61 | 3.66% | | 0.7 | 0.5000 | 139.44 | 138.37 | 0.78% | | 1.0 | 0.5000 | (Mixed State) | -- | -- |

Note: The extracted frequency accurately follows the theoretical Rabi frequency v0 until strong dephasing washes out the oscillations.

Files included

• photon_wave_particle.py – Main simulation for light.
• temporal_balance.py – Original model for massive particles.
• README.md – Updated documentation.
• CITATION.cff – Metadata for academic citation.
• requirements.txt – Software dependencies.

How to cite

If you use this release, please cite:

Berramdane, R. (2026). DTQEM v17.0 – Unified Wave-Particle Simulator. Zenodo. https://doi.org/10.5281/zenodo.20159679

License

CC BY-NC 4.0 (Creative Commons Attribution-NonCommercial 4.0 International). This software is for research and educational purposes only. Commercial use is strictly prohibited without prior authorization.