Physics

In Klein tunneling, a negatively charged electron (brightly colored sphere) can transit perfectly through a barrier. In a new experiment, researchers observed the Klein tunneling of electrons into a special kind of superconductor. As electrons tunneled through the barrier, they each picked up a partner, doubling the conductance measured in the experiment. To balance out
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Laser pulses. Credit: University of Tsukuba A team at the University of Tsukuba studied a novel process for creating coherent lattice waves inside silicon crystals using ultrashort laser pulses. Using theoretical calculations combined with experimental results that were obtained at the University of Pittsburgh, they were able to show that coherent vibrational signals could be
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C.L. Holloway in his atomic-recording studio. The stereo recording of Queen’s ‘Under Pressure’ with an atom-based receiver shows the simultaneous detection of the vocal and instrumental part of a song by two atomic species. This illustrates that the atom receiver can receive multi-path communication signals simultaneously. Credit: J. Burrus at NIST It sounds like an
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In particle physics, a jet is a shower of collimated particles generated by a highly energetic quark or gluon. In a lead-lead collision, jets must traverse through quark gluon plasma, altering their energy, track and consistency. In his dissertation, Tomas Snellman studied whether there are differences in the characteristics of jets between proton-proton and proton-lead
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Magnetic vector map (50 µm field of view) describing the magnetisation of a Ni film while applying 50 V across the ferroelectric substrate of PMN-PT. The colour wheel identifies magnetisation direction. Yellow and brown denotes regions whose magnetisation was unaffected by the voltage. Credit: Diamond Light Source The high resolution and wealth of data provided
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A three-jet event detected by the TASSO detector at DESY. Credit: Oxford PPU Forty years ago, in 1979, experiments at the DESY laboratory in Germany provided the first direct proof of the existence of gluons—the carriers of the strong force that “glue” quarks into protons, neutrons and other particles known collectively as hadrons. This discovery
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Intracavity optical trapping. The trapping optics (collimators C1 and C2, lenses L1 and L2) are placed within the cavity of a ring fiber laser (whose direction is indicated by the red arrows) so that the position of the particle can influence the cavity loss. a When the particle is not in the trap region, the
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The Advanced Photoinjector EXperiment (APEX) and test beamline at Berkeley Lab, pictured here in 2016, served as a prototype for the LCLS-II X-ray laser upgrade project. Credit: Roy Kaltschmidt/Berkeley Lab The successful test of the LCLS-II electron gun (see related article) marks the culmination of an R&D effort spanning more than a decade at the
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Nothing lasts forever. Humans, planets, stars, galaxies, maybe even the Universe itself, everything has an expiration date. But things in the quantum realm don’t always follow the rules. Now, scientists have found that quasiparticles in quantum systems could be effectively immortal. That doesn’t mean they don’t decay, which is reassuring. But once these quasiparticles have
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A new superconducting magnet has briefly sustained an astonishing 45.5 tesla magnetic field intensity. For comparison, your flimsy fridge magnets have about 1 percent of a single tesla. The measurement, achieved by researchers at the National High Magnetic Field Laboratory (MagLab) at Florida State University resets the bar on what’s possible in direct current magnetic
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New research has revealed a previously unknown source of magnetism deep within our planet’s stupidly hot, squishy layers. Far from being magnetically dead, some of Earth’s mantle might have pockets of iron oxide (Fe2O3) with enough magnetic pull to have a real effect. A research team made up of scientists from around the globe has
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