Quantum Computing
Explore the fundamentals of quantum computing through interactive examples and practical applications.
Core Concepts
Superposition
Quantum bits (qubits) can exist in multiple states simultaneously. This enables parallel processing and faster computations through quantum parallelism.
// Qiskit example: create a qubit in superposition
q = QuantumRegister(1)
circuit = QuantumCircuit(q)
circuit.h(q) // Hadamard gate creates superposition
Entanglement
When particles become entangled, their quantum states are correlated regardless of distance. This enables quantum teleportation and secure communication.
// Create entangled Bell state
qr = QuantumRegister(2)
bell = QuantumCircuit(qr)
bell.h(qr[0])
bell.cx(qr[0], qr[1])
// Qubits are now entangled
Build Your First Circuit
Simple Quantum Circuit
This circuit demonstrates a qubit in superposition followed by measurement.
Code Implementation
from qiskit import QuantumCircuit, execute, Aer
# Create quantum circuit with 1 qubit
qc = QuantumCircuit(1)
qc.h(0) # Apply Hadamard gate
qc.measure_all() # Measure qubit
# Simulate execution
sim = Aer.get_backend('qasm_simulator')
result = execute(qc, sim, shots=1024).result()
Run this code in our sandbox environment to see quantum coin flip results!
Run Simulation →Quantum Gate Challenge
Task: Implement X Gate
Create a circuit that applies a Pauli-X gate (quantum NOT) operation to a single qubit. Test it with different initial states.
// Quantum NOT operation const qc = new QuantumCircuit(1); qc.x(0); // Apply Pauli-X gate qc.measure(0, 0); qc.draw();
// Expected output (state vector): [0, 1]