Your First Quantum Circuit

Learn to build and execute quantum circuits using our interactive simulator.

What is a Quantum Circuit?

A quantum circuit is a sequence of quantum computations using qubits and quantum gates to perform operations. In this tutorial, we'll use a basic circuit with two qubits to demonstrate essential quantum operations.

Basic quantum circuit layout with qubit gates

Build Your Circuit

Initialize Qubits

qreg q[2];
h q[0];
cz q[0], q[1];

Start with two qubits in state |0⟩. Apply a Hadamard gate to create superposition on qubit 0.

Add Control Gates

x q[1];
measure q[0], c[0];

Apply a CNOT gate entangling qubit 0 and qubit 1. Then measure qubit 0 to the classical register.

Observe Results

Counts: |00⟩: 50%
|11⟩: 50%

The measurement results show entangled states with equal probability, demonstrating quantum correlations.

Visualize Circuit

This visualization shows the quantum gates applied to qubits in the circuit.

Interactive Circuit Builder

Build and Test Circuits

Use our real-time simulator to add or modify gates. Try adding different configurations and see immediate results!

• Drag and drop gates onto qubit lines
• Visual real-time entanglement monitoring
• Full circuit simulation at scale

Quantum State Visualizer

Simulating circuit...

Please install Qiskit for full simulation

Applications of Quantum Circuits

🔐

Quantum Cryptography

Use quantum circuits to implement protocols like QKD for ultra-secure data transmission.

🌌

Material Simulation

Model molecular interactions and chemical reactions with quantum circuits.

🔍

Optimization Problems

Solve complex logistical problems using quantum annealing techniques.