Quantum Computing

Overview

Quantum computers that can be utilized in practical settings are steadily moving closer to becoming a reality. These machines can, in principle, solve problems and perform tasks in seconds that would take classical computers centuries. 

Traditional computers store and process information using fundamental units, which can be in either an on (1) or off (0) state. Trillions of units are processed during computing tasks, switching back and forth between these states. On the other hand, a quantum computer's units—called qubits—can be in both states simultaneously. They can also be linked together, enabling more efficient manipulation and processing of these units. However, qubits are incredibly fragile and prone to introducing errors when the simultaneous states break down.

Scientists have employed various techniques to develop functioning quantum computers. The most common approach relies on superconducting qubits—microscopic circuits that behave like artificial atoms—which both Google and IBM have demonstrated. Other approaches utilize photons—particles of light—ions suspended in electric fields, and exotic states of matter known as Majorana particles.

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