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    Josephson junction tagged posts

    Resurrecting Niobium for Quantum Science

    February 29, 2024, Categories  Uncategorized

    The Josephson junction is the information-processing heart of the superconducting qubit. Pictured here is the niobium Josephson junction engineered by David Schuster of Stanford University and his team. Their junction design has resurrected niobium as a viable option as a core qubit material.
    The Josephson junction is the information-processing heart of the superconducting qubit. Pictured here is the niobium Josephson junction engineered by David Schuster of Stanford University and his team. Their junction design has resurrected niobium as a viable option as a core qubit material. (Image by Alexander Anferov/the University of Chicago’s Pritzker Nanofabrication Facility.)

    Expanding possibilities for superconducting qubits. For years, niobium was considered an underperformer when it came to superconducting qubits. Now scientists supported by Q-NEXT have found a way to engineer a high-performing niobium-based qubit and so take advantage of niobium’s superior qualities.

    When it comes to quantum technology, niobium is making a comeback...

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    Optical Fiber could Boost Power of Superconducting Quantum Computers

    March 25, 2021, Categories  Physics, Technology/Electronics

    White arrow points to tiny fiber running vertically through large metal device (cryostat)
    NIST physicists measured and controlled a superconducting quantum bit (qubit) using light-conducting fiber (indicated by white arrow) instead of metal electrical cables like the 14 shown here inside a cryostat. By using fiber, researchers could potentially pack a million qubits into a quantum computer rather than just a few thousand.
    Credit: F. Lecocq/NIST

    The secret to building superconducting quantum computers with massive processing power may be an ordinary telecommunications technology – optical fiber.

    Physicists at the National Institute of Standards and Technology (NIST) have measured and controlled a superconducting quantum bit (qubit) using light-conducting fiber instead of metal electrical wires, paving the way to packing a million qubits into a quantum computer rather than ...

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    Nanowire could provide a Stable, easy-to-make Superconducting Transistor

    February 15, 2021, Categories  Physics, Technology/Electronics

    superconducting nanowire
    MIT researchers are developing a superconducting nanowire, which could enable more efficient superconducting electronics.
    Credits:Image: Christine Daniloff, MIT

    Superconductors—materials that conduct electricity without resistance—are remarkable. They provide a macroscopic glimpse into quantum phenomena, which are usually observable only at the atomic level. Beyond their physical peculiarity, superconductors are also useful. They’re found in medical imaging, quantum computers, and cameras used with telescopes.

    But superconducting devices can be finicky. Often, they’re expensive to manufacture and prone to err from environmental noise. That could change, thanks to research from Karl Berggren’s group in the Department of Electrical Engineering and Computer Science.

    The researche...

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