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qubit state

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  • Pure qubit state — In quantum information processing, a pure qubit state is a non zero Quantum superposition of two basis states, conventionally written in bra ket notation notation as | 0 angle and | 1 angle . Two pure qubit states are physically indistinguishable …   Wikipedia

  • Qubit — A qubit is not to be confused with a cubit, which is an ancient measure of length. A quantum bit or qubit IPA| [ kju.bɪt] (sometimes also qbit) is a unit of quantum information. That information is described by a state vector in a two level… …   Wikipedia

  • qubit — /kūˈbit/ noun The basic unit of information in quantum computing, consisting of an individual atom or subatomic particle considered as forming a binary system by representing its spin state as 1 or 0 ORIGIN: quantum and bit …   Useful english dictionary

  • qubit — noun /ˈkjuːbɪt,ˈkjubɪt/ a quantum bit; the unit of quantum information; a bit in a quantum computer capable of being in a state of superposition. Syn: qbit, quantum bit See Also: qutrit …   Wiktionary

  • Flux qubit — In quantum computing, flux qubits (also known as persistent current qubits) are micrometer sized loops of superconducting metal interrupted by a number of Josephson junctions. The junction parameters are engineered during fabrication so that a… …   Wikipedia

  • Bell state — The Bell states are a concept in quantum information science and represent the simplest possible examples of entanglement. They are named after John S. Bell, as they are the subject of his famous Bell inequality. A Bell pair is a pair of qubits… …   Wikipedia

  • Charge qubit — Circuit diagram of a Cooper pair box circuit. The island (dotted line) is formed by the superconducting electrode between the gate capacitor and the junction capacitance. In quantum computing, a charge qubit is a superconducting qubit whose basis …   Wikipedia

  • Cluster state — In quantum information and quantum computing, a cluster state is a type of highly entangled state of multiple qubits. Cluster states are generated in lattices of qubits with Ising type interactions. A cluster C is a connected subset of a d… …   Wikipedia

  • Greenberger-Horne-Zeilinger state — In physics, in the area of quantum information theory, a Greenberger Horne Zeilinger state is a certain type of entangled quantum state which involves at least three subsystems (particles). It was first studied by D. Greenberger, M.A. Horne and… …   Wikipedia

  • Quantum state — In quantum physics, a quantum state is a mathematical object that fully describes a quantum system. One typically imagines some experimental apparatus and procedure which prepares this quantum state; the mathematical object then reflects the… …   Wikipedia

  • Cat state — In quantum computing, the cat state, named after Schrödinger s cat, [John Gribbin (1984), In Search of Schrödinger s Cat , ISBN 0 552 12555 5, 22nd February 1985, Transworld Publishers, Ltd, 318 pages.] is the special state where the qubits are… …   Wikipedia

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