The week in physics: Protein quantum sensors; Fluid-coupled rotation; Smooth and creamy chocolate

The Week in Physics Fluid-coupled rotation demonstrates unexpected modes of motion Two cylinders rotating in a fluid can mimic the behavior of gears and of a belt-and-pulley system. Sarah Wells FEB 19, 2026 What makes for smooth, creamy chocolate? Chocolatiers adjust properties of chocolate's ingredients to confect a treat that feels as good as it tastes. Erich J. Windhab FEB 17, 2026 ADVERTISEMENT Science Policy Moves Fast. Don't Fall Behind. FYI: Science Policy News is your trusted source for what's happening now and what's coming next. Get clear, reliable coverage of science policy through content designed for how you read: a weekly planning newsletter, in-depth articles, and a concise monthly recap. Choose one or all three and stay informed! From the vault Color in electronic displays Everything from the physics of light generation to the human factors of color perception must be considered in their design. Lawrence E. Tannas Jr DEC 01, 1992 What can physicists do? Tyler Drye tackles challenges to technical patents Toni Feder FEB 19, 2026 Genetically engineered protein is a versatile quantum sensor In noisy biological environments, the fluorescent protein can pinpoint subcellular structures and detect magnetic field changes. Alex Lopatka FEB 20, 2026 ADVERTISEMENT Free Job Postings for REU and Intern Roles It's peak recruitment season for REUs/internships. Post for FREE at Physics Today Jobs Network—where four scientific boards deliver maximum visibility! Your FREE post reaches SPS Jobs, Physics Today Jobs and may repost further, depending on relevance. Select the REU/Internship option! Post a Job Get Job Alerts Browse All Jobs Asst/Assoc Professor - Applied AI/ML and Advanced AI Applications University of Wyoming (Laramie, Wyoming) View Job Two-Year Visiting Assistant Professor of Physics Davidson College (Davidson, North Carolina) View Job Postdoctoral Scholar, Physics University of Nevada, Reno (Reno, Nevada) View Job Group Leader - Electron and X-ray Microscopy (EXM) Argonne National Laboratory (Lemont, Illinois) View Job Senior Research Scientist – Temperature Metrology National Institute of Standards and Technology, Dept of Commerce (Gaithersburg, Maryland) View Job Senior Research Scientist Zap Energy (Everett, Washington State) View Job Physics Today is published by the American Institute of Physics. To manage your AIP email preferences and newsletter subscriptions, click here. Or unsubscribe from all AIP emails. © 2026 American Institute of Physics Physics Today 1 Physics Ellipse College Park, MD 20740 +1 (301) 209 3100