Quantum network devices, systems, and methods

    公开(公告)号:US11784806B2

    公开(公告)日:2023-10-10

    申请号:US17061376

    申请日:2020-10-01

    CPC classification number: H04L9/0858 G01B9/02017 H04B10/70 H04L9/0855

    Abstract: Quantum network devices, systems, and methods are provided to enable long-distance transmission of quantum bits (qubits) for applications such as Quantum Key Distribution (QKD), entanglement distribution, and other quantum communication applications. Such systems and methods provide for separately storing first, second, third, and fourth photons, wherein the first and second photons and the third and fourth photons are respective first and second entangled photon pairs, triggering a synchronized retrieval of the stored first, second, third, and fourth photons such that the first photon is propagated to a first node, the second and third photons are propagated to a second node, and the fourth photon is propagated to a third node, and creating a new entangled pair comprising the first and fourth photons at the first and third nodes to transmit quantum information.

    SYSTEM AND METHOD FOR EMBEDDED DIFFUSE CORRELATION SPECTROSCOPY

    公开(公告)号:US20230314221A1

    公开(公告)日:2023-10-05

    申请号:US18022793

    申请日:2021-08-27

    Inventor: Wei LIN

    CPC classification number: G01J3/457 A61B5/0261 A61B5/0075

    Abstract: DCS analyzer including a memory to store autocorrelation values, model parameters, fitting parameters, and simulated correlation values from a DCS model; a mean square error (MSE) module to compute MSE between theoretical autocorrelation values computed from the model parameters and measured autocorrelation values; a sorting module to sort three latest MSE values obtained from the MSE module and generate indexes of largest, medium, and smallest MSE values; a convergence checking module to determine whether convergence is reached in solving an autocorrelation equation; a search module to calculate αDB and β values at reflection, extension, contraction, and shrink locations; a comparison module to compare two latest MSE values and find new αDB and β values to replace values associated with a largest MSE; a state controller coupled with the memory and the modules to control an operation thereof; and an output buffer to present a fitted solution of the autocorrelation equation.

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