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    Physics

    The first observation of a stable torus of fluid’s resonance frequencies

    A team of researchers at Laroche Laboratory, Université Paris Diderot and Université de Lyon has recently collected the first measurements of the resonance frequencies of a stable torus of fluid. The method they used to collect these observations, outlined in a paper published in Physical Review Letters, could enable the modeling of a variety of large-scale structures that transiently arise in vortex rings. …read more

    Source:: Physorg Physics

          

    Testing quantum mechanics in a non-inertial reference frame using a rotating interferometer

    A team of researchers from the University of Glasgow and the University of Southampton has devised a novel way to test quantum mechanics in a non-inertial reference frame by using a rotating interferometer. In their paper published in the journal Physical Review Letters, the group describes studying the Hong-Ou-Mandel interference using fiber coils on a rotating disk, and what they found. …read more

    Source:: Physorg Physics

          

    New technology gives a glimpse of solar fuel generation in action

    Electrochemical devices that use sunlight to generate fuel represent a promising means of harvesting sustainable energy; but currently, none are efficient enough for real-world applications. One of the main reasons for the slow development is the difficulty in observing and measuring what is happening at the liquid-catalyst interface—the location in the cell where the fuel-producing chemical reactions are taking place—without interfering with the processes. …read more

    Source:: Physorg Physics

          

    Quantum computers could arrive sooner if we build them with traditional silicon technology

    Quantum computers have the potential to revolutionize the way we solve hard computing problems, from creating advanced artificial intelligence to simulating chemical reactions in order to create the next generation of materials or drugs. But actually building such machines is very difficult because they involve exotic components and have to be kept in highly controlled environments. And the ones we have so far can’t outperform traditional machines as yet. …read more

    Source:: Physorg Physics

          

    JILA’s novel atomic clock design offers ‘tweezer’ control

    JILA physicists have demonstrated a novel atomic clock design that combines near-continuous operation with strong signals and high stability, features not previously found together in a single type of next-generation atomic clock. The new clock, which uses laser “tweezers” to trap, control and isolate the atoms, also offers unique possibilities for enhancing clock performance using the tricks of quantum physics. …read more

    Source:: Physorg Physics

          

    Researchers use metamaterials to create two-part optical security features

    Researchers have developed advanced optical security features that use a two-piece metamaterial system to create a difficult-to-replicate optical phenomenon. Metamaterials are engineered to have a property that is not found in naturally occurring materials. The new security features could offer improved forgery protection for high-value products or banknotes and enhance encryption of information such as pin numbers that are physically sent to recipients. …read more

    Source:: Physorg Physics

          

    Researchers produce synthetic Hall Effect to achieve one-way radio transmission

    Researchers at the University of Illinois at Urbana-Champaign have replicated one of the most well-known electromagnetic effects in physics, the Hall Effect, using radio waves (photons) instead of electric current (electrons). Their technique could be used to create advanced communication systems that boost signal transmission in one direction while simultaneously absorbing signals going in the opposite direction. …read more

    Source:: Physorg Physics

          

    Dynamic charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor

    Charge density fluctuations are observed in all families of high-critical temperature (Tc) superconducting cuprates. Although constantly found in the underdoped region of the phase diagram at relatively low temperatures, physicists are unclear how the substrates influence unusual properties of these systems. In a new study now published on Science, R. Arpaia and co-workers in the departments of microtechnology and nanoscience, the European Synchrotron, and quantum device physics in Italy, Sweden and France used resonant X-ray scattering to carefully determine the charge density modulations in Yttrium Barium Copper Oxide (YBa2Cu3O7– ẟ) and Neodymium Barium Copper Oxide (Nd1+xBa2–xCu3O7–ẟ) for several doping levels. The research team isolated short-range dynamic charge density fluctuations (CDFs) in addition to the previously known quasi-critical charge density waves (CDW). The results persisted well above the pseudo-gap temperature T*, which they characterized by a few milli-electron volts (meV) to spread across a large area of the phase diagram. …read more

    Source:: Physorg Physics

          

    Metasurface holograms: Fast, compact polarization measurements for spectroscopy and sensing

    For the first time, researchers have used ultra-thin layers of 2-D structures known as metasurfaces to create holograms that can measure the polarization of light. The new metasurface holograms could be used to create very fast and compact devices for polarization measurements, which are used in spectroscopy, sensing and communications applications. …read more

    Source:: Physorg Physics

          

    Students make neutrons dance beneath UC Berkeley campus

    In an underground vault enclosed by six-foot concrete walls and accessed by a rolling, 25-ton concrete-and-steel door, University of California, Berkeley, students are making neutrons dance to a new tune: one better suited to producing isotopes required for geological dating, police forensics, hospital diagnosis and treatment. …read more

    Source:: Physorg Physics

          

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