qiskit

IBM quantum computing framework. Use when targeting IBM Quantum hardware, working with Qiskit Runtime for production workloads, or needing IBM optimization tools. Best for IBM hardware execution, quantum error mitigation, and enterprise quantum computing. For Google hardware use cirq; for gradient-based quantum ML use pennylane; for open quantum system simulations use qutip.

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Qiskit - IBM Quantum Computing Framework

Skill Overview


Qiskit is the world's most popular open-source quantum computing framework, supporting Python programming, quantum circuit construction, quantum algorithm implementation, and execution on IBM's real quantum hardware.

Applicable Scenarios


  • Learning and research in quantum computing: Suitable for students, researchers, and developers to quickly get started with quantum programming and to test quantum algorithms on local simulators.

  • Production-grade quantum application development: Run optimization tasks on IBM Quantum hardware via Qiskit Runtime, supporting session mode and batch jobs.

  • Quantum algorithm implementation: Includes a rich library of quantum algorithms, covering VQE, QAOA, quantum machine learning, quantum chemistry, and other applications.
  • Core Features


  • Quantum circuit construction and optimization: Use QuantumCircuit to create quantum circuits, supporting over 80 quantum gate operations; automatic transpilation optimizations reduce two-qubit gates by 29%.

  • Primitive interfaces (Primitives): Provides two execution interfaces, Sampler (to obtain measurement results) and Estimator (to compute expectation values), simplifying quantum program development.

  • Multi-backend execution: Supports local statevector simulator, Qiskit Aer noise simulator, and cloud platforms such as IBM Quantum, IonQ, and Amazon Braket.
  • Frequently Asked Questions

    What is Qiskit? Is it suitable for beginners to learn quantum computing?


    Qiskit is an open-source quantum computing framework developed by IBM, with over 13 million downloads, offering a complete quantum programming toolchain. It is very suitable for beginners; together with the official documentation and the Qiskit Textbook tutorial, you can progress from basic quantum gate operations to quantum algorithm implementation. After local installation, you can run quantum circuits on simulators without applying for a cloud account.

    How to run Qiskit quantum simulators locally?


    After installing with uv pip install qiskit, you can run quantum circuits locally using StatevectorSampler. For example, create a Bell state quantum circuit and perform measurements; the results are returned as a probability distribution. Qiskit also supports rich visualization features, including circuit diagrams, state distribution histograms, Bloch sphere, and more.

    Is Qiskit free? How to apply for an IBM Quantum account?


    Qiskit is completely free and open-source. Running on local simulators requires no account. To run on IBM's real quantum hardware, you can register for a free IBM Quantum account and use the API token to access Qiskit Runtime services. Free accounts have quota limits; academic research can apply for additional resources through the IBM Quantum Network.