Imaging tool under development exposes concealed detonators—and their charge

Sandia National Laboratories researchers, from left, Yuan-Yu Jau, George Burns, Justin Christensen and Ed Bielejec plan to test a future neutron generator for an electric-field imaging system at Sandia’s Ion Beam Laboratory. Credit: Randy Montoya Behold the neutron, the middle child of subatomic particles. At times overshadowed by its electrically charged siblings the proton and … Read more

Glass sponges reveal important properties for the design of ships, skyscrapers and planes of the future

Hydrodynamic field inside and outside the skeletal structure of the Euplectella aspergillum glass sponge. The field was reconstructed using CINECA super-computers. Kinetic methodologies and advanced computational codes have allowed to accurately reconstruct the living conditions of the depth sponges, highlighting their remarkable structural and fluid dynamic properties. Credit: G. Falcucci, Tor Vergata University of Rome … Read more

Capturing electrons in space

Physicists Roland Wester (left) and Malcolm Simpson (right) demonstrate how dipole-bound states allow negative ions to form in interstellar clouds. Credit: Bryan Goff on Unsplash / AG Wester Interstellar clouds are the birthplaces of new stars, but they also play an important role in the origins of life in the Universe through regions of dust … Read more

Laser improves the time resolution of CryoEM

Graphical abstract. Credit: DOI: 10.1016/j.cplett.2021.138812 In 2017, Jacques Dubochet, Joachim Frank, and Richard Henderson won the Nobel Prize in Chemistry for their contributions to cryo-electron microscopy (cryoEM), an imaging technique that can capture pictures of biomolecules such as proteins with atomic precision. In cryoEM, samples are embedded in vitreous ice, a glass-like form of ice … Read more

The realization of curved relativistic mirrors to reflect high-power laser pulses

The principle underlying dynamical ptychography. Credit: Chopineau et al. One of the topics investigated in recent physics studies is strong-field quantum electrodynamics (SF-QED). So far, this area has rarely been explored before, mainly because the experimental observation of SF-QED processes would require extremely high light intensities (>1025W/cm2), over three orders of magnitude higher than those … Read more

Test of Lord Kelvin’s isotropic helicoid ideas fail to prove theory correct

Credit: G. Voth/Wesleyan University, via Physics A small team of researchers from Wesleyan University, Aix Marseille University and Gothenburg University has attempted to test Lord Kelvin’s isotropic helicoid theory by building several test objects and dropping them in a tub of water. In their paper published in the journal Physical Review Letters, the group describes … Read more

New method found for moving tiny artificial swimmers

Credit: Pixabay/CC0 Public Domain Princeton researchers have debuted a novel way of generating and potentially controlling locomotion in tiny objects called artificial swimmers. These swimmers have sparked considerable interest for their potential applications in medicine, industry and other sectors. Spherical in shape and sporting two tails, the Princeton swimmers—like many other artificial microswimmers—take a cue … Read more

Emergent magnetic monopoles isolated using quantum-annealing computer

Researchers have used a D-Wave quantum-annealing computer as a testbed to examine the behavior of emergent magnetic monopoles. Shown here, emergent magnetic monopoles traverse a lattice of qubits in a superconducting quantum annealer. Nonzero flux programmed around the boundary creates a trapped monopole in the degenerate ground state. Credit: Los Alamos National Laboratory Using a … Read more

Physicists discover simple propulsion mechanism for bodies in dense fluids

Credit: Pixabay/CC0 Public Domain A team of researchers from Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), the University of Liège and the Helmholtz Institute Erlangen-Nürnberg for Renewable Energy have developed a micro-swimmer that appears to defy the laws of fluid dynamics: Their model, consisting of two beads connected by a linear spring, is propelled by completely symmetrical oscillations. The … Read more

Producing memory from speckle patterns

A team of researchers has developed a way to significantly increase the memory of speckle patterns, the very complex patterns that result from shining a laser light onto an opaque sheet, such as paper, biological tissue, or fog. The method, developed by researchers from Yale, Bilkent University, National Nanotechnology Research Center (UNAM), Vienna University of … Read more