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  • How atomic physics is central to the new definition of the kilogram May 28, 2020
    Thursday, May 28, 2020 Standard measurement units like the meter and the kilogram used to be defined by physical objects, such as a prototype bar and a platinum cylinder. As of May 2019, all measurement units are now defined by the cesium atom and the fundamental constants of the universe.
  • Lossless conduction at the edges May 26, 2020
    Atomically thin layers of the semimetal tungsten ditelluride conduct electricity losslessly along narrow, one-dimensional channels at the crystal edges. The material is therefore a second-order topological insulator. By obtaining experimental proof of this behavior, physicists have expanded the pool of candidate materials for topological superconductivity.
  • The Collapsing Leviathan May 26, 2020
    I was seriously depressed for the last week, by noticeably more than my baseline amount for the new pandemic-ravaged world. The depression seems to have been triggered by two pieces of news: The US Food and Drug Administration—yes, the same FDA whose failure to approve covid tests in February infamously set the stage for the […]
  • News, 2020 May 25, 2020
  • A stitch in time: How a quantum physicist invented new code from old tricks May 22, 2020
    Building large-scale quantum computers will require suppression of errors. Scientists have used a neat trick to apply powerful 3D error-suppression codes in a 2D architecture, something one industry insider said many thought was impossible.
  • 'One-way' electronic devices enter the mainstream May 21, 2020
    Engineers are the first to build a high-performance non-reciprocal device on a compact chip with a performance 25 times better than previous work. The new chip, which can handle several watts of power (enough for cellphone transmitters that put out a watt or so of power), was the leading performer in a DARPA SPAR program […]
  • Quantum Computing Lecture Notes 2.0 May 20, 2020
    Two years ago, I posted detailed lecture notes on this blog for my Intro to Quantum Information Science undergrad course at UT Austin. Today, with enormous thanks to UT PhD student Corey Ostrove, we’ve gotten the notes into a much better shape (for starters, they’re now in LaTeX). You can see the results here (7MB)—it’s […]
  • Team builds hybrid quantum system by entangling molecule with atom May 20, 2020
    Physicists have boosted their control of the fundamental properties of molecules at the quantum level by linking or 'entangling' an electrically charged atom and an electrically charged molecule, showcasing a way to build hybrid quantum information systems that could manipulate, store and transmit different forms of data.
  • Quantum leap: Photon discovery is a major step toward at-scale quantum technologies May 20, 2020
    A team of physicists has developed the first integrated photon source with the potential to deliver large-scale quantum photonics. The development of quantum technologies promises to have a profound impact across science, engineering and society. Quantum computers at scale will be able to solve problems intractable on even the most powerful current supercomputers, with many […]
  • Scientists use light to accelerate supercurrents, access forbidden light, quantum world May 19, 2020
    Scientists are using light waves to accelerate supercurrents to access the unique and potentially useful properties of the quantum world.
  • Seed fund backs $2.8M in new quantum ideas at the University of Waterloo May 19, 2020
    Tuesday, May 19, 2020 Improving thermal medical imaging of the eye with a new quantum camera and developing new materials to enable “beyond 5G” wireless communications are among the goals of six projects recently supported by the Quantum Quest Seed Fund (QQSF).
  • DARPA Selects 7 Teams to Research Optimization with NISQ Devices and Potential Funding as High as $35 Million May 18, 2020
    The U.S. Defense Advanced Research Projects Agency (DARPA) has started a program called ONISQ (Optimization with Noisy Intermediate-Scale Quantum) Devices with a potential budget of $35 million over four years. The program will research how a hybrid concept that combines intermediate-sized quantum devices (hundreds to thousands of qubits) with classical computing systems could solve combinatorial […]
  • Scientists use pressure to make liquid magnetism breakthrough May 18, 2020
    Scientists have forced a solid magnetic metal into a spin liquid state, which may lead to insights into superconductivity and quantum computing.
  • Quantum Hall effect 'reincarnated' in 3D topological materials May 18, 2020
    Physicists have found surprising evidence of a link between the 2D quantum Hall effect and 3D topological materials that could be used in quantum computing.
  • Physicists develop world's best quantum bits May 18, 2020
    A team of researchers has set a new record for preparing and measuring the quantum bits, or qubits, inside of a quantum computer without error. The techniques they have developed make it easier to build quantum computers that outperform classical computers for important tasks, including the design of new materials and pharmaceuticals.
  • A theoretical boost to nano-scale devices May 18, 2020
    Researchers have developed a new approach to the underlying physics of semiconductors. They calculated the quasi-Fermi levels in molecular junctions applying an ab initio approach.
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