# QubitLang

> QubitLang is a quantum programming language designed to make quantum computing accessible to developers, researchers, and students. Write quantum algorithms with intuitive, English-like syntax and run them on simulators or real quantum hardware from IBM Quantum, IonQ, and Rigetti.

QubitLang provides a complete platform for quantum software development: a domain-specific language with clean syntax, a browser-based Web IDE with syntax highlighting and circuit visualization, AI-powered circuit optimization, and multi-backend execution supporting both local simulation and cloud quantum hardware.

## Key Information

- **Website**: [https://www.qubitlang.net](https://www.qubitlang.net)
- **Category**: Quantum Computing / Developer Tools / Programming Language
- **Pricing**: Free tier available; paid plans from £25/mo to £500/mo
- **Contact**: support@qubitlang.net

## Pages

- [Home](https://www.qubitlang.net/): Overview of QubitLang and its capabilities
- [Features](https://www.qubitlang.net/features/): Detailed feature breakdown — syntax, backends, AI optimization, IDE, circuit designer, team collaboration
- [Pricing](https://www.qubitlang.net/pricing/): Plans (Developer free, Starter £25/mo, Growth £100/mo, Scale £500/mo) and hardware credit rates
- [Documentation](https://www.qubitlang.net/documentation/): Quick start guide, language reference, API docs, CLI reference, tutorials, hardware backend guides
- [Examples](https://www.qubitlang.net/examples/): Working code samples — Bell states, Grover's search, quantum teleportation, VQE, QAOA
- [Learn](https://www.qubitlang.net/learn/): Interactive tutorials from beginner to advanced
- [Community](https://www.qubitlang.net/community/): Developer community, open source contributions, events
- [Privacy Policy](https://www.qubitlang.net/privacy/): Data collection and privacy practices
- [Terms of Service](https://www.qubitlang.net/terms/): Usage terms and conditions

## Tutorials

- [Bell State](https://www.qubitlang.net/learn/bell-state/): Beginner — Create quantum entanglement with Hadamard and CNOT gates
- [Grover's Search](https://www.qubitlang.net/learn/grover/): Intermediate — Quantum search with amplitude amplification
- [Quantum Teleportation](https://www.qubitlang.net/learn/teleportation/): Intermediate — State transfer via entanglement
- [VQE](https://www.qubitlang.net/learn/vqe/): Advanced — Variational Quantum Eigensolver for molecular simulation
- [QAOA](https://www.qubitlang.net/learn/qaoa/): Advanced — Quantum Approximate Optimization for combinatorial problems

## Core Features

1. **Intuitive Syntax**: English-like quantum gate declarations, automatic qubit management, clear error messages
2. **Multi-Backend Execution**: IBM Quantum (Eagle, Heron), IonQ (Aria, Forte), Rigetti (Ankaa), local simulator
3. **AI-Powered Optimization**: Gate fusion, hardware-aware transpilation, noise-aware routing
4. **Browser-Based IDE**: Monaco editor with QubitLang support, real-time syntax checking, one-click job submission
5. **Circuit Visualization**: Interactive SVG circuit diagrams with zoom/pan and gate tooltips
6. **Team Collaboration**: Organization management, role-based access, shared projects

## Language Basics

QubitLang programs use these core constructs:
- `QUBIT q1, q2` — Declare qubits
- `H(q)` — Hadamard gate (superposition)
- `CNOT(q1, q2)` — Controlled-NOT gate (entanglement)
- `CZ(q1, q2)` — Controlled-Z gate
- `RX(q, angle)`, `RY(q, angle)`, `RZ(q, angle)` — Rotation gates
- `MEASURE q -> c` — Measure qubit into classical bit
- `FOR`, `REPEAT`, `IF/ELSE` — Control flow

## Optional

- [Full LLM context](https://www.qubitlang.net/llms-full.txt): Extended version with complete code examples and documentation content