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    Deep Learning for Quantum Sensing

    February 8, 2023, Categories  Physics, Technology/Electronics

    Scheme of the implemented deep learning protocol.
    Scheme of the implemented deep learning protocol. A limited number of quantum probe states are fed into the sensor treated as a black box. A grid of measurement results is collected to train a neural network, which learns the posterior probability distribution associated with the single-measurement Bayesian update. Such distribution is used to define the reward of the RL agent that sets the control phases on the black-box device. Image credit: Cimini et al., doi 10.1117/1.AP.5.1.016005

    Quantum sensing represents one of the most promising applications of quantum technologies, with the aim of using quantum resources to improve measurement sensitivity...

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    Nanoscale Ferroelectric Semiconductor could Power AI and Post-Moore’s Law Computing on a Phone

    February 7, 2023, Categories  Physics, Technology/Electronics

    Nanoscale ferroelectric semiconductor could power AI and post-Moore's Law computing on a phone
    a) Cross-sectional HAADF-STEM image of the 5 nm thick ScAlN grown on Mo template. (b) and (c) Nano-beam electron diffraction patterns captured from the Mo (b) and ScAlN (c) regions labeled in (a). (d) Magnified HAADF-STEM image showing the thickness of the ScAlN layer. (e) Schematic of the epitaxial relationship between wz-ScAlN and bcc-Mo. (f) EDS element maps for the ITO/ScAlN/Mo capacitor. Credit: Applied Physics Letters (2023). DOI: 10.1063/5.0136265

    Ferroelectric semiconductors are contenders for bridging mainstream computing with next generation architectures, and now a team at the University of Michigan has made them just five nanometers thick—a span of just 50 or so atoms.

    This paves the way for integrating ferroelectric technologies with conventional components used in ...

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    Entangled Atoms Cross Quantum Network from one Lab to another

    February 7, 2023, Categories  Physics, Technology/Electronics

    Illustration mehrerer Gebäude mit einer roten Kugel im ersten Gebäude und einer grünen Kugel im letzten, dazwischen eine strichlierte Linie.
    The nodes of this network were housed in two labs at the Campus Technik to the west of Innsbruck, Austria.

    Trapped ions are one of the leading systems to build quantum computers and other quantum technologies. To link multiple such quantum systems, interfaces are needed through which the quantum information can be transmitted. In recent years, researchers led by Tracy Northup and Ben Lanyon at the University of Innsbruck’s Department of Experimental Physics have developed a method for doing this by trapping atoms in optical cavities such that quantum information can be efficiently transferred to light particles. The light particles can then be sent through optical fibers to connect atoms at different locations...

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    A Quasiparticle that can Transfer Heat under Electrical Control

    February 3, 2023, Categories  Physics, Technology/Electronics

    Because thermal conductivity in this class of materials can be changed with application of an external electric field at room temperature, they hold promise for use in heat switches for everyday applications, like collection of solar power.
    Photo: Getty Images

    Scientists have found the secret behind a property of solid materials known as ferroelectrics, showing that quasiparticles moving in wave-like patterns among vibrating atoms carry enough heat to turn the material into a thermal switch when an electrical field is applied externally.

    A key finding of the study is that this control of thermal conductivity is attributable to the structure of the material rather than any random collisions among atoms...

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