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  2. Qubit - Wikipedia

    en.wikipedia.org/wiki/Qubit

    The general definition of a qubit as the quantum state of a two-level quantum system.In quantum computing, a qubit (/ ˈ k juː b ɪ t /) or quantum bit is a basic unit of quantum information—the quantum version of the classic binary bit physically realized with a two-state device.

  3. Physical and logical qubits - Wikipedia

    en.wikipedia.org/wiki/Physical_and_logical_qubits

    A logical qubit specifies how a single qubit should behave in a quantum algorithm, subject to quantum logic operations which can be built out of quantum logic gates. However, issues in current technologies preclude single two-state quantum systems , which can be used as physical qubits, from reliably encoding and retaining this information for ...

  4. Quantum circuit - Wikipedia

    en.wikipedia.org/wiki/Quantum_circuit

    An n-qubit (reversible) quantum gate is a unitary mapping U from the space H QB(n) of n-qubit registers onto itself. Typically, we are only interested in gates for small values of n . A reversible n -bit classical logic gate gives rise to a reversible n -bit quantum gate as follows: to each reversible n -bit logic gate f corresponds a quantum ...

  5. Stabilizer code - Wikipedia

    en.wikipedia.org/wiki/Stabilizer_code

    Download as PDF; Printable version; In other projects ... A simple example of a stabilizer code is a three qubit [[,,]] ... be the set of phase-free Pauli operators ...

  6. Quantum programming - Wikipedia

    en.wikipedia.org/wiki/Quantum_programming

    The following example demonstrates the implementation of a Bell state using Ket: from ket import * a , b = quant ( 2 ) # Allocate two quantum bits H ( a ) # Put qubit `a` in a superposition cnot ( a , b ) # Entangle the two qubits in the Bell state m_a = measure ( a ) # Measure qubit `a`, collapsing qubit `b` as well m_b = measure ( b ...

  7. Quantum register - Wikipedia

    en.wikipedia.org/wiki/Quantum_register

    Download QR code; Print/export ... Examples: The quantum state vector of a 5-qubit register is a unit vector in =. ...

  8. Nuclear magnetic resonance quantum computer - Wikipedia

    en.wikipedia.org/wiki/Nuclear_magnetic_resonance...

    Molecule of alanine used in NMR implementation of quantum computing. Qubits are implemented by spin states of the black carbon atoms. Nuclear magnetic resonance quantum computing (NMRQC) [1] is one of the several proposed approaches for constructing a quantum computer, that uses the spin states of nuclei within molecules as qubits.

  9. One-way quantum computer - Wikipedia

    en.wikipedia.org/wiki/One-way_quantum_computer

    The purpose of quantum computing focuses on building an information theory with the features of quantum mechanics: instead of encoding a binary unit of information (), which can be switched to 1 or 0, a quantum binary unit of information (qubit) can simultaneously turn to be 0 and 1 at the same time, thanks to the phenomenon called superposition.

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