Physics

SAMURAI measures 5G communications channels precisely

Engineers at the National Institute of Standards and Technology (NIST) have developed a flexible, portable measurement system to support design and repeatable laboratory testing of fifth-generation (5G) wireless communications devices with unprecedented accuracy across a wide range of signal frequencies and scenarios.

Grasshopper jumping on Bloch sphere finds new quantum insights

New research has (pardon the pun) put a new spin on a mathematical analogy involving a jumping grasshopper and its ideal lawn shape. This work could help us understand the spin states of quantum-entangled particles.

The first evidence of vector meson spin alignment in heavy-ion collisions

The ALICE collaboration is a large group of researchers from over 100 physics institutes worldwide that focuses on the study of quark-gluon plasma using data collected by the ALICE (A Large Ion Collider Experiment) detector. ALICE is a heavy-ion detector designed to examine the physics of strongly interacting matter at extreme energy densities, which is part of CERN's Large Hadron Collider (LHC) particle accelerator ring.

New Class of Planet Can Form Around Black Holes, Say Astronomers

The dust clouds around supermassive black holes are the perfect breeding ground for an exotic new type of planet

Inexpensive, accessible device provides visual proof that masks block droplets

Duke physician Eric Westman was one of the first champions of masking as a means to curtail the spread of coronavirus, working with a local non-profit to provide free masks to at-risk and under-served populations in the greater Durham community.

Scientists develop principles for the creation of an 'acoustic diode'

In research published in Science Advances, a group led by scientists from the RIKEN Center for Emergent Matter Science (CEMS) have used the principle of magneto-rotation coupling to suppress the transmission of sound waves on the surface of a film in one direction while allowing them to travel in the other. This could lead to the development of acoustic rectifiers—devices that allow waves to propagate preferentially in one direction, with potential applications in communications technology.

Measuring electron emission from irradiated biomolecules

When fast-moving ions cross paths with large biomolecules, the resulting collisions produce many low-energy electrons which can go on to ionize the molecules even further. To fully understand how biological structures are affected by this radiation, it is important for physicists to measure how electrons are scattered during collisions. So far, however, researchers' understanding of the process has remained limited.

Updating Turing's model of pattern formation

In 1952, Alan Turing published a study which described mathematically how systems composed of many living organisms can form rich and diverse arrays of orderly patterns. He proposed that this 'self-organization' arises from instabilities in un-patterned systems, which can form as different species jostle for space and resources. So far, however, researchers have struggled to reproduce Turing patterns in laboratory conditions, raising serious doubts about its applicability.

Researchers tease out the unique chemical fingerprint of the most aggressive free radical in living things

Free radicals—atoms and molecules with unpaired electrons—can wreak havoc on the body. They are like jilted paramours, destined to wander about in search of another electron, leaving broken cells, proteins and DNA in their wakes.

Q&A: Harnessing sound to better monitor aging pipeline infrastructure

Underground pipelines, some as old as the cities they service, are often far past their intended lifespan and the need for replacing them looms as an expense most municipalities can't afford.

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