QCOM 0.2.1

Quantum Computation Library

QCOM

Quantum Computation (QCOM) is a Python package originally developed as part of Avi Kaufman’s 2025 honors thesis, and now maintained as an ongoing project for quantum systems research.

QCOM offers a lightweight, extensible toolkit for building model Hamiltonians, evolving states, and analyzing classical/quantum information measures from simulated or experimental bitstring data.

---

📦 Installation

pip install QCOM

Upgrade to the latest release:

pip install --upgrade QCOM

⸻

✅ Quick check in python

import qcom
print("QCOM version:", qcom.__version__)

⸻

✨ Core Capabilities

• Hamiltonians

  • Exact builders for Rydberg systems (chains/ladders)
  • (Growing set) utilities to support additional models

• Solvers

  • Static: thin-spectrum eigen solve, ground-state utilities, dense full spectrum for small systems
  • Dynamic: generic time evolution under time-dependent Hamiltonians via matrix exponentials

• Metrics

  • Classical: Shannon entropy, conditional entropy, mutual information
  • Quantum: von Neumann entanglement entropy (from state vectors, density matrices, or Hamiltonians)
  • Probability tools: cumulative distributions, N(p) diagnostic, statevector → probabilities

• Data & Noise

  • Parse/normalize/sample binary datasets (Plaintext, Parquet, Aquila JSON)
  • Readout noise models (bit-flip) and optional mitigation via mthree

• I/O

  • Save/load in plaintext and Parquet
  • Lightweight JSON reader for QuEra Aquila results

• Developer Ergonomics

  • ProgressManager hooks for long tasks
  • Clear conventions (MSB ↔ site 0), endianness controls where relevant

---

🚀 Examples

• Build a ladder Rydberg Hamiltonian and compute its ground-state entropy
• Parse measurement data (e.g., from Aquila) and evaluate mutual information
• Simulate readout error on a probability distribution and apply mitigation
• Sample and merge large bitstring datasets for statistical analysis

---

📚 Tutorials

Step-by-step notebooks live in the repository:

• Tutorials directory:
  https://github.com/AviKaufman/QCOM/tree/main/tutorials

Suggested order:

1. I/O basics (text, JSON, Parquet)
2. Lattice registers and geometry
3. Rydberg Hamiltonians
4. Static eigen solvers (ground states)
5. Control time series
6. Dynamic time evolution
7. Data utilities (noise, sampling, mitigation)
8. Metrics (classical + entanglement)

---

🧪 Testing

From the project root:

pytest
# or restrict to the project tests folder
pytest tests/

If you see an “import file mismatch” error, clear caches:

find . -name "__pycache__" -type d -exec rm -rf {} +
find . -name "*.pyc" -delete

⸻

📂 Example Data

Curated toy datasets for quick experiments:

• https://github.com/AviKaufman/QCOM/tree/main/example_data

⸻

🗺️ Roadmap

• New Hamiltonians: Ising, Heisenberg, and additional lattice models
• Parameter sweeps for large optimization workloads
• Tensor-network methods: DMRG / TEBD for large Hilbert spaces
• Expanded I/O readers and richer plotting presets

Community feedback helps shape priorities—feel free to open issues or PRs.

⸻

🤝 Contributing

We welcome contributions of all sizes: • Bug reports, minimal reproductions • Tests and doc improvements • New examples/tutorials • Feature proposals via GitHub Issues

Repo: https://github.com/AviKaufman/QCOM

⸻

📬 Contact

Avi Kaufman — [e-mail]

⸻

Last updated: October 15, 2025