This Week in Physics - Measuring Entropy in Active-Matter Systems

This Week in Physics Magazine — November 21, 2022 Viewpoint Measuring Entropy in Active-Matter Systems Matteo Paoluzzi – November 21, 2022 A tool for estimating the local entropy production rate of a system enables the visualization and quantification of the out-of-equilibrium regions of an active-matter system. Viewpoint Probing the Limits of Nuclear Existence November 16, 2022 Researchers have discovered the heaviest-known bound isotope of sodium and characterized other neutron-rich isotopes, offering important benchmarks for refining nuclear models. Focus Dark Matter as an Intergalactic Heat Source November 18, 2022 Spectra from quasars suggest that intergalactic gas may have been heated by a form of dark matter called dark photons. Synopsis Frequency Combs from Just One Mode November 18, 2022 Experiments disprove the general assumption that more than one wave mode is needed to produce a spectral pattern called a frequency comb. Research News Predicting Hemorrhagic Stroke November 17, 2022 Patient-specific modeling could help clinicians determine whether an individual's brain aneurysm is at risk of bursting. synopsis Icicle Structure Reveals Growth Dynamics November 17, 2022 Some icicles develop surface ripples as they grow. Researchers now explain the growth mechanism, but a full explanation remains elusive. Research News Honeybee Tongue Hair Linked to Nectar-Collection Efficiency November 16, 2022 The length and diameter of the hairs on a honeybee's tongue determine how efficiently it can collect nectar from different flowers, a finding that could help communities plant the right flowers for this declining insect. Synoposis A Conformal Map Model for Leaf Growth November 16, 2022 Physicists have shown that a mathematical transformation called a conformal map can be used to predict how leaves grow. Research News Expanding Universe in the Lab November 15, 2022 Researchers control the speed of sound in an ultracold gas, mimicking features of a curved spacetime and reproducing quantum field behavior predicted in early Universe models. Synoposis Axion Miniclusters Might Be Microlenses November 15, 2022 Asteroid-sized clumps of a dark matter candidate known as an axion could be detectable in a gravitational-microlensing survey. 1 Physics Ellipse, College Park, MD 20740 © 2022 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.