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@quantumlib

quantumlib

Google's open-source software for the quantum world.

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  1. Cirq Cirq Public

    Python framework for creating, editing, and running Noisy Intermediate-Scale Quantum (NISQ) circuits.

    Python 4.9k 1.2k

  2. Qualtran Qualtran Public

    Qᴜᴀʟᴛʀᴀɴ is a Python library for expressing and analyzing Fault Tolerant Quantum algorithms.

    Python 299 90

  3. qsim qsim Public

    Fast C++ and Python library for state-vector simulation of quantum circuits.

    C++ 633 194

  4. OpenFermion OpenFermion Public

    Python package for compiling and analyzing quantum algorithms to simulate electronic structures.

    Python 1.7k 411

  5. Stim Stim Public

    A fast stabilizer circuit library.

    C++ 623 184

  6. ReCirq ReCirq Public

    Python modules for quantum computing applications and experiments using Cirq. Research using Cirq!

    Python 300 129

Repositories

Showing 10 of 17 repositories
  • Qualtran Public

    Qᴜᴀʟᴛʀᴀɴ is a Python library for expressing and analyzing Fault Tolerant Quantum algorithms.

    quantumlib/Qualtran’s past year of commit activity
    Python 299 Apache-2.0 90 230 32 Updated Jan 23, 2026
  • Cirq Public

    Python framework for creating, editing, and running Noisy Intermediate-Scale Quantum (NISQ) circuits.

    quantumlib/Cirq’s past year of commit activity
    Python 4,851 Apache-2.0 1,177 111 (19 issues need help) 30 Updated Jan 23, 2026
  • OpenFermion Public

    Python package for compiling and analyzing quantum algorithms to simulate electronic structures.

    quantumlib/OpenFermion’s past year of commit activity
    Python 1,660 Apache-2.0 411 44 (24 issues need help) 25 Updated Jan 22, 2026
  • qsim Public

    Fast C++ and Python library for state-vector simulation of quantum circuits.

    quantumlib/qsim’s past year of commit activity
    C++ 633 Apache-2.0 194 46 (4 issues need help) 9 Updated Jan 21, 2026
  • ReCirq Public

    Python modules for quantum computing applications and experiments using Cirq. Research using Cirq!

    quantumlib/ReCirq’s past year of commit activity
    Python 300 Apache-2.0 129 14 (13 issues need help) 6 Updated Jan 21, 2026
  • Stim Public

    A fast stabilizer circuit library.

    quantumlib/Stim’s past year of commit activity
    C++ 623 Apache-2.0 184 61 14 Updated Jan 21, 2026
  • tesseract-decoder Public

    Search-based decoder for quantum error correction (QEC) written in C++ and Python.

    quantumlib/tesseract-decoder’s past year of commit activity
    C++ 91 Apache-2.0 16 13 17 Updated Jan 9, 2026
  • TypedUnits Public

    A fast units and dimensions library with support for static dimensionality checking and protobuffer serialization.

    quantumlib/TypedUnits’s past year of commit activity
    Python 9 Apache-2.0 6 1 (1 issue needs help) 1 Updated Jan 9, 2026
  • unitary Public

    Open-source API library providing common operations for adding quantum behaviors to games.

    quantumlib/unitary’s past year of commit activity
    OpenQASM 41 Apache-2.0 28 18 8 Updated Jan 1, 2026
  • chromobius Public

    Open-source implementation of a Möbius decoder for color codes used in quantum error correction (QEC)

    quantumlib/chromobius’s past year of commit activity
    Python 26 Apache-2.0 6 1 4 Updated Dec 13, 2025

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