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    quantum computer tagged posts

    A Logical Magic State with Fidelity beyond Distillation Threshold realized on Superconducting Quantum Processor

    December 29, 2023, Categories  Physics, Technology/Electronics

    Experimental results of the prepared different logical states. (a) Logical state fidelity with post-selection in Bloch sphere. The fidelity of the preparation of different logical states is represented as a circle, which is divided into multiple annular sectors, each representing a point on the Bloch sphere, with the radial direction representing the polar angle θ and the tangential direction representing the azimuthal angle φ. The obtained average logical fidelity is 0.8983. (b) Logical measurement results of X ̂_L, Y ̂_L, Z ̂_L as a function of polar angle θ or azimuthal angle φ. The colored dashed curves are the result of fitting with trigonometric function.

    Quantum computers have the potential to outperform conventional computers on some tasks, including complex optimization...

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    Researchers use Quantum Computer to Identify Molecular Candidate for Development of more Efficient Solar Cells

    July 31, 2023, Categories  Physics, Technology/Electronics

    ORNL team members applied three independent strategies to decrease their project’s computational workload, which reduced their time to solution from months to a few weeks. First, in a technique called qubit tapering, they decreased the number of qubits required to express the problem, reducing the size of the problem itself. Second, they took fewer measurements to solve the problem by measuring groups of terms once rather than measuring each individual term from every group (a process called qubit-wise commutativity). Third, instead of implementing each circuit individually, they found a way to run four circuits in parallel, allowing them to use all 20 qubits in the H1-1. Illustration credit: Adam Malin/ORNL.

    Using the full capabilities of the Quantinuum H1-1 quantum computer, resear...

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    Absolute Zero in the Quantum Computer

    April 5, 2023, Categories  Physics

    moving particles, clocks and equations
    © IQOQI/ÖAW
    When many quantum particles interact, complex systems can be formed. And this complexity allows reaching a temperature of absolute zero – at least in principle.

    Erasing data perfectly and reaching the lowest possible temperature — those two things seem to be completely different, but they are closely intertwined. The absolute lowest temperature possible is -273.15 degrees Celsius. It is never possible to cool any object exactly to this temperature — one can only approach absolute zero. This is the third law of thermodynamics.

    A research team at TU Wien (Vienna) has now investigated the question: How can this law be reconciled with the rules of quantum physics? They succeeded in developing a “quantum version” of the third law of thermodynamics: Theoretically, absolute ze...

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    A Molecule that Responds to Light

    April 14, 2021, Categories  Physics, Technology/Electronics

    Based on the Europium(III) scientists aim to advance the development of Quantum Computers. (S. Kuppusamy, KIT)
    Based on the Europium(III) scientists aim to advance the development of Quantum Computers. (S. Kuppusamy, KIT)

    Light can be used to operate quantum information processing systems, e.g. quantum computers, quickly and efficiently. Researchers at Karlsruhe Institute of Technology (KIT) and Chimie ParisTech/CNRS have now significantly advanced the development of molecule-based materials suitable for use as light-addressable fundamental quantum units. As they report in the journal Nature Communications, they have demonstrated for the first time the possibility of addressing nuclear spin levels of a molecular complex of europium(III) rare-earth ions with light.

    Whether in drug development, communication, or for climate forecasts: Processing information quickly and efficiently is crucial i...

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