This Week in Physics — A New Science for Describing Unhealthy Online Environments

This Week in Physics Magazine — June 5, 2023 Viewpoint A New Science for Describing Unhealthy Online Environments Elisabeth Wilhelm – June 5, 2023 A theory derived from nonlinear fluid dynamics is able to reproduce the formation dynamics of online hate communities—offering insights that could inform public policies. Research News Humans Help Computers Spot Bursts from Space June 1, 2023 Citizen scientists combed through radio astronomy observations to identify new sources of transient emission that computer algorithms overlooked. Focus Environmental Noise Makes a Sensor More Sensitive June 2, 2023 By exploiting a phenomenon called stochastic resonance, sensors can perform better in a noisy environment than in a noise-free setting. synopsis Another Way for Black Holes to Evaporate June 2, 2023 The gravitational fields of black holes and other compact objects are strong enough to wrest pairs of particles and antiparticles out of the vacuum and into existence, causing the objects to decay. synopsis A Textbook Dirac Semimetal June 1, 2023 Researchers have synthesized a chalcogenide compound that has the electronic structure of an ideal Dirac semimetal—which could facilitate the study of this exotic class of materials. synopsis Bond Density Not Strength Controls Polymer Stickiness May 31, 2023 Experiments show that the sticky behavior of so-called associative polymers is controlled by the density of bonding structures, contradicting theoretical predictions. 1 Physics Ellipse, College Park, MD 20740 © 2023 American Physical Society | All rights reserved View Email Online You are receiving this message because you signed up to receive Physics Magazine email alerts or are a member of APS. Manage Email Preferences.

This Week in Physics — Realizing the Einstein-Podolsky-Rosen Paradox for Atomic Clouds

This Week in Physics Magazine — May 30, 2023 Viewpoint Realizing the Einstein-Podolsky-Rosen Paradox for Atomic Clouds Margaret D. Reid – May 30, 2023 A new demonstration involving hundreds of entangled atoms tests Schrödinger's interpretation of Einstein, Rosen, and Podolsky's classic thought experiment. Focus Predicting When a Material Will Crack May 26, 2023 A combination of two techniques provides warning signs that the stress on a material will lead to failure. Video Drops Wear Different "Crowns" May 23, 2023 A study of drops falling on a thin liquid film finds that splash behavior depends on film thickness—a result that could impact our understanding of stalagmite formation. synopsis Superconductor Vortices Visible as Stripes May 30, 2023 An unusual kind of superconductor harbors magnetic vortices that researchers predict should be readily observable thanks to the striped configurations they adopt. synopsis Angle and Friction Matter for Table Tennis Spin May 26, 2023 The angle of incidence and the friction of the surface are the only factors that impact the spin of a table tennis ball after it collides with a rigid surface. synopsis "Shuttled" Ions Stay Quantum May 26, 2023 Researchers move an individual Mg+ ion more than 100,000 times between different sites in a trapping array without dropping it or ruining its quantum coherence. synopsis Static Electrons in Flat-Band Nonequilibrium Superconductors May 25, 2023 Single electrons stay stationary in superconductors with "flat-band" electronic structures, which could lead to low-energy-consumption devices made from such materials. synopsis Gravity Alters the Shape of an Evaporating Droplet May 24, 2023 Whether sitting or hanging, the surface of a protein-containing droplet changes as the water escapes, an effect researchers link to the pull of gravity. synopsis Curved-Laser Demonstration for a Higher-Energy Laser Accelerator May 23, 2023 A curved "laser wakefield accelerator" could boost the acceleration potential of a multistage version of this device. Research News Squeezable Metal Offers a Greener Approach to Refrigeration May 30, 2023 A system built around a metal that gains and loses heat when compressed could lead the way to the commercialization of chemical-free refrigeration technology. Research News Survey Finds Cheating Is Common in Graduate School May 25, 2023 In a survey of 244 engineering graduate students, one fifth admit to cheating or committing some form of research malpractice during their studies. Research News Researchers Recreate a Nearsighted Eye May 23, 2023 A new device can recreate the refractive errors of a myopic eye—one that displays nearsightedness—allowing scientists to test lenses designed to slow down the progression of the condition. 1 Physics Ellipse, College Park, MD 20740 © 2023 American Physical Society | All rights reserved View Email Online You are receiving this message because you signed up to receive Physics Magazine email alerts or are a member of APS. Manage Email Preferences.

This Week in Physics — Quantum Repeater Goes the Distance

This Week in Physics Magazine — May 22, 2023 Viewpoint Quantum Repeater Goes the Distance Michal Hajdušek – May 22, 2023 A quantum repeater based on trapped ions allows the transmission of entangled, telecom-wavelength photons over 50 km. Research News Space Dirt Reveals Age of Saturn's Rings May 15, 2023 Micrometeoroids in Saturn's rings reveal that these dusty bands are no more than 400 million years old, making them significantly younger than the 4.5-billion-year-old gas giant. synopsis Record Precision for Hydrogen Spectroscopy Measurements May 18, 2023 Measurements of the hyperfine splitting of certain electronic levels of hydrogen have broken precision records, potentially enabling precise tests of quantum electrodynamics. Research News Body Heat Limits Animals' Roaming Range May 16, 2023 Large animals can move quickly thanks to their long appendages, but their ability to roam in response to climate change is also affected by their need to dissipate heat produced by their bulky bodies. synopsis Electron Bunches Break the Picosecond Barrier May 17, 2023 A method for producing ultrashort, ultracold electron bunches could improve the resolution of electron-based imaging methods. Research News Measuring Cosmic Expansion with a Lensed Supernova May 18, 2023 Astronomers have demonstrated a new method for determining the Hubble constant that involves measuring the time delay between multiple images of a lensed supernova. synopsis Quantum Boost for Magnetic Induction Tomography May 16, 2023 Quantum effects improve the performance of magnetic induction tomography—an imaging technique that has promising medical applications. 1 Physics Ellipse, College Park, MD 20740 © 2023 American Physical Society | All rights reserved View Email Online You are receiving this message because you signed up to receive Physics Magazine email alerts or are a member of APS. Manage Email Preferences.