# Qiskit Framework

> Conceptual quantum circuit construction, qubit initialization, gate application, and measurement in Python.

- Skill: `j4flmao/qiskit-framework` (Agent Skill)
- Install (CLI): `npx skillmds@latest add j4flmao/qiskit-framework`
- Raw SKILL.md: https://api.skillmd.com/api/skills/j4flmao/qiskit-framework/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: j4flmao (https://skillmd.com/u/j4flmao)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/j4flmao/qiskit-framework

---


# Qiskit Framework

Qiskit is IBM's open-source SDK for quantum computing. It provides a programmatic abstraction for designing quantum circuits, compiling them for specific architectures, and executing them on simulators or physical QPUs.

## Theoretical Foundation & Architecture

Quantum circuits in Qiskit are represented as DAGs (Directed Acyclic Graphs). A `QuantumCircuit` instance holds `QuantumRegister` and `ClassicalRegister` objects. Unitary operations (gates) manipulate the quantum state space $\mathbb{C}^{2^n}$, while measurements collapse the state onto the computational basis, recording outcomes in classical bits.

## Actionable Execution

1. **Initialization:** Instantiate `QuantumCircuit(n, m)` with $n$ qubits and $m$ classical bits. All qubits initialize to $|0\rangle$.
2. **Gate Application:** 
   - Apply single-qubit gates (e.g., `qc.h(0)`, `qc.rx(theta, 0)`).
   - Apply entangling two-qubit gates (e.g., `qc.cx(0, 1)` for CNOT).
3. **Measurement:** Map quantum states to classical registers (`qc.measure(qubit_index, bit_index)`).
4. **Execution:** Transpile the circuit for a target backend and invoke `run()`.

## Execution Flow

```mermaid
%%{init: {"theme": "default", "flowchart": {"useMaxWidth": true}}}%%
flowchart TD
    A[Start] --> B[Initialize QuantumCircuit]
    B --> C[Allocate Quantum and Classical Registers]
    C --> D[Apply Unitary Gates]
    D --> E[Apply Entangling Operations]
    E --> F[Add Measurement Operations]
    F --> G[Transpile Circuit for Backend]
    G --> H[Execute on Simulator or QPU]
    H --> I[Analyze Results/Counts]
    I --> J[End]
```