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Quantum Computers Appear – and Are Put to Work

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Hank Hogan, Contributing Editor, [email protected]

Actual quantum computers are likely a decade or more away, but advances today are bringing them closer and closer. You can’t yet buy them online or at a big box store, but the day of quantum computers has drawn closer, thanks to recent events. Many are advances involving the production, storage and manipulation of particles of light. That makes sense, given that photons are often the carriers of choice for quantum information. Progress in quantum computing and associated technology has been so substantial that the field is drawing significant commercial attention. In March,...Read full article

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    Published: June 2013
    Glossary
    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.
    quantum dots
    A quantum dot is a nanoscale semiconductor structure, typically composed of materials like cadmium selenide or indium arsenide, that exhibits unique quantum mechanical properties. These properties arise from the confinement of electrons within the dot, leading to discrete energy levels, or "quantization" of energy, similar to the behavior of individual atoms or molecules. Quantum dots have a size on the order of a few nanometers and can emit or absorb photons (light) with precise wavelengths,...
    quantum key distribution
    Quantum key distribution (QKD) is a method of secure communication that utilizes principles from quantum mechanics to establish a shared secret key between two parties, typically referred to as Alice and Bob, while detecting any potential eavesdropping attempts by a third party, commonly known as Eve. The fundamental principle behind QKD is the use of quantum properties, such as the superposition principle and the no-cloning theorem, to enable the distribution of cryptographic keys in a...
    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...
    AmericasAndrew WhiteAsia-PacificAustraliaBasic ScienceBlackberryBoson samplingboson-sampling machinesBrad Pietrasbulk opticsCanadaChinaCommunicationsD-Wave SystemsdefenseEnglandEuropeFeaturesHank HoganIan WalmsleyLockheed MartinMarylandMassachusettsMatthew BroomenanoOpticsPaul Lettquantum calculationquantum computersquantum computingquantum dotsquantum informationquantum information transmissionquantum key distributionquantum memmoryqubitRaymond LaflammeSensors & DetectorsUniversity of Oxford

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