How do quantum computers work, and are they better than classical computers?

Quantum computers use tiny particles that can be in many places at once to solve problems faster than regular computers.

Imagine you're looking for a toy hidden under one of five cups. A regular computer checks each cup, one by one, like counting from 1 to 5. But a quantum computer is like having all the cups lift up at the same time so you can see where the toy is right away. That’s because quantum particles act like they're in multiple places at once.

In regular computers, we use bits that are either 0 or 1, like a light switch that's either on or off. But quantum computers use qubits, which can be both 0 and 1 at the same time. This is like having a spinning coin, it’s not fully heads or tails until it lands.

Because qubits can do many things at once, quantum computers are really good at solving certain tricky problems, like guessing a password when you don’t know all the clues yet. But they’re not always better than regular computers, just like how your toy box is faster for finding toys, but you still need your backpack for going on a trip.