from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A quantum bit.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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


from Wiktionary, Creative Commons Attribution/Share-Alike License

Blend of quantum and bit, influenced by cubit.


  • 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

  • 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.


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

    Quantum Computing

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

    Quantum Computing

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


  • 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

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

    Quantum Computing

  • 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

  • The spin of the electron dictates the value of the quantum bit, or " qubit ."

    Spin Doctors Create Quantum Chip

  • A quantum bit, or "qubit", is analogous the bits used in conventional computers.

    The Speculist: September 2006 Archives


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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