Quantum computer

A quantum computer is a type of computer that uses the principles of quantum mechanics—the physics of very small particles like atoms and electrons—to process information in ways that classical computers cannot.

Classical computer vs quantum computer

Classical computers	Use bits: either 0 or 1 Everything your laptop/phone does is built on these 0/1 combinations
Quantum computers	Use qubits (quantum bits) A qubit can be: 0 1 or both at the same time → called superposition

This ability to be in multiple states at once gives quantum computers their unique power.

Key quantum principles they use

• Superposition

A qubit can represent multiple values simultaneously.
This means a quantum computer can explore many possibilities at once.

• Entanglement

Qubits can be linked so that changing one instantly affects the other, even if far apart.
This allows extremely fast coordination between qubits.

• Interference

Quantum computers can amplify correct answers and cancel wrong ones through wave-like behavior.