quantum bit

noun

, Computers.

1. the fundamental unit of information in a quantum computer, capable of existing in two states, 0 or 1, simultaneously or at a different time.

quantum bit

1. The smallest unit of information in a quantum computer. Unlike bits in classical systems, which are in one of two possible states labelled 1 and 0, a quantum bit exists in a superposition of these two states, settling on one or the other only when a measurement of the state is made.
2. Also called qubit

Word History and Origins

Origin of quantum bit¹

First recorded in 1990–95

Example Sentences

These processors have been able to hold several hundred single-atom quantum systems up to now, whereby each atom represents one quantum bit or qubit as the basic unit of quantum information.

From Science Daily

This was achieved by introducing the novel method of "quantum bit supercharging."

From Science Daily

But complicating their application in quantum computing comes in the form of gaining accurate measurements of the quantum bit states.

From Science Daily

By harnessing the strange behavior of quantum mechanics, a quantum bit, or qubit, can store a combination of 1 and 0 — a little like how a spinning coin holds the tantalizing possibility that it will turn up either heads or tails when it finally falls flat on the table.

From New York Times

In the latest step, a team has demonstrated a way to detect errors in the setting of a quantum bit—or qubit—that’s guaranteed not to make matters worse.

From Science Magazine