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“Photonic machine gun” fires up supercomputer research

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Jörg Schwartz, [email protected]

The entanglement of photons is key to developing quantum computers and cryptography devices. However, understanding exactly what entanglement means is tricky, as is generating entangled photons at defined points in time. Researchers at Imperial College London have now come up with an idea for a system that can shoot out large numbers of entangled photons when needed – and they call it a “photonic machine gun.” Quantum computing is a concept that uses the laws of quantum mechanics, such as superposition and entanglement, to perform operations on data. Quantum computers...Read full article

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    Published: December 2009
    Glossary
    electron
    A charged elementary particle of an atom; the term is most commonly used in reference to the negatively charged particle called a negatron. Its mass at rest is me = 9.109558 x 10-31 kg, its charge is 1.6021917 x 10-19 C, and its spin quantum number is 1/2. Its positive counterpart is called a positron, and possesses the same characteristics, except for the reversal of the charge.
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    photon
    A quantum of electromagnetic energy of a single mode; i.e., a single wavelength, direction and polarization. As a unit of energy, each photon equals hn, h being Planck's constant and n, the frequency of the propagating electromagnetic wave. The momentum of the photon in the direction of propagation is hn/c, c being the speed of light.
    quantum mechanics
    The science of all complex elements of atomic and molecular spectra, and the interaction of radiation and matter.
    qubit
    A qubit, short for quantum bit, is the fundamental unit of information in quantum computing and quantum information processing. Unlike classical bits, which can exist in one of two states (0 or 1), qubits can exist in multiple states simultaneously, thanks to a quantum property known as superposition. This unique feature enables quantum computers to perform certain types of calculations much more efficiently than classical computers. Key characteristics of qubits include: Superposition: A...
    Basic ScienceCommunicationselectronEntangled photonsImperial College LondonJörg SchwartzLindnermachine gunnanoNetanel H LindnerphotonPhysical Review Lettersprobabilityquantum communicationquantum computersquantum dotquantum mechanicsqubitResearch & TechnologyRudophsuperpositionTech PulseTechnion-Israel Institute of TechnologyTerry Rudoph

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