Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun computing A quantum bit; the unit of quantum information; a bit in a quantum computer capable of being in a state of superposition.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Blend of quantum and bit, influenced by cubit.

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Examples

  • Now when I say qubits, I have to stress that the term qubit hasn't got a very precise definition at the moment, and I've been arguing for a long time that the physics community ought to get together and decide on some criteria for different senses for the word qubit.

    The Father of Quantum Computing 2007

  • Now when I say qubits, I have to stress that the term qubit hasn't got a very precise definition at the moment, and I've been arguing for a long time that the physics community ought to get together and decide on some criteria for different senses for the word qubit.

    The Father of Quantum Computing Quinn Norton 2007

  • A small distance (300 nanometers, or 300 billionths of a meter) from the resonator, the scientists fabricated a second nanoscale device known as a single-Cooper-pair box, or superconducting "qubit"; a qubit is the basic unit of quantum information.

    innovations-report 2009

  • The qubit is the quantum analogue of the bit, the classical fundamental unit of information.

    Quantum Computing Hagar, Amit 2007

  • In general, thus, the physical state of a qubit is the superposition

    Quantum Computing Hagar, Amit 2007

  • The qubit is the fundamental equivalent of the digital computing "bit."

    Gizmodo Zack Stern 2011

  • In contrast, a qubit is a system which can be asked many, many different questions, but to each question, only one of two answers can be given.

    Ars Technica 2010

  • (i.e., the qubit is a unit vector in the aforementioned two-dimensional Hilbert state), we may

    Quantum Computing Hagar, Amit 2007

  • What I mean here is a qubit which is capable of being in any quantum state, and is capable of undergoing any kind of entanglement with another qubit of the same technology, and all those conditions are actually necessary to make a fully fledged quantum computer.

    The Father of Quantum Computing Quinn Norton 2007

  • What I mean here is a qubit which is capable of being in any quantum state, and is capable of undergoing any kind of entanglement with another qubit of the same technology, and all those conditions are actually necessary to make a fully fledged quantum computer.

    The Father of Quantum Computing 2007

  • Each ion can encode a qubit, a unit of quantum computation that can be ‘0’ or ‘1’ like ordinary bits, but also a superposition of both states simultaneously.

    Physicists create long-sought topological quantum states Davide Castelvecchi 2023

  • IBM has unveiled the first quantum computer with more than 1,000 qubits — the equivalent of the digital bits in an ordinary computer.

    IBM releases first-ever 1,000-qubit quantum chip Davide Castelvecchi 2023

Comments

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  • "Recent experiments with superconducting qubits are motivated by the goal of fabricating a quantum computer, but at the same time they illuminate the more fundamental aspects of quantum mechanics. In this paper we analyze the physics of switching current measurements from the point of view of macroscopic quantum mechanics."

    - G. S. Paraoanu, How Do Scrödinger Cats Die?.

    June 9, 2009