How do quantum computers differ from classical computers?.

Quantum computers utilize quantum bits (qubits) that can exist in multiple states simultaneously, allowing them to process vast amounts of data at unprecedented speeds. In contrast, classical computers rely on bits that are either 0 or 1. This fundamental difference enables quantum computers to perform complex calculations much faster than classical counterparts, particularly in fields such as cryptography and material science. However, classical computers are still more efficient for many everyday tasks.