Physics

Giving valleytronics a boost

Physicists have revealed a new quantum process in valleytronics that can speed up the development of this fairly new technology.

Mathematics reveals new insights into Marangoni flows

The Marangoni effect is a popular physics experiment. It is produced when an interface between water and air is heated in just one spot. Since this heat will radiate outwards, a temperature gradient is produced on the surface, causing the fluid to move through the radiation process of convection. When un-dissolvable impurities are introduced to this surface, they are immediately swept to the side of the water's container. In turn, this creates a gradient in surface tension which causes the interface to become elastic.

Placing another piece in the dark matter puzzle

Very little is known about the exact nature of dark matter. Currently, some of the most promising dark matter candidates are extremely light bosonic particles such as axions, axion-like particles or even dark photons. "These can also be regarded as a classical field oscillating at a certain frequency. But we can't yet put a figure on this frequency—and therefore the mass of the particles," explains Professor Dmitry Budker. "That is why in the CASPEr research program, we are systematically investigating different frequency ranges looking for hints of dark matter."

Study shows ability to detect light from UV to the IR optical regimes using spin currents

A University of Wyoming researcher and his team have shown that the spin Seebeck effect (SSE) can be used to detect light across a broad optical range—ultraviolet through visible to near-infrared. This work has future implications on novel spin current-based technologies.

Alert system for failing nuclear plant pipes uses thin films and sound vibrations

A failing pipe can be tough to spot. It may cause a puddle, produce another sign of damage, or simply burst before detection. A flooded kitchen or laundry room is messy and inconvenient, but the stakes are much, much higher in nuclear power plants—which on average contain many miles of pipeline.

A Space-Age Journey into the Past with Albert Lin

Albert Lin with one of his drones, preparing to explore the Nan Madol site in Micronesia, in a scene from Lost Cities. (Credit: National Geographic)

One of the happy surprises of the space age is that the same technologies propelling our civilization into the future have also proven hugely valuable for recovering lost details of civilizations past. Over the past three decades, satellite imagery and space-based radar have been used to locate more than 1,000 unknown ancient tombs in Egypt, to

Microscale rockets can travel through cellular landscapes with precision

A new study shows how micro-scale 'rockets,' powered by acoustic waves and an on-board bubble motor, can be maneuvered through 3D landscapes of cells and particles using magnets.

Small magnets: Wide-ranging impact on information technology

Physicists have identified a microscopic process of electron spin dynamics in nanoparticles that could impact the design of applications in medicine, quantum computation, and spintronics.

Small magnets reveal big secrets

An international research team led by a physicist at the University of California, Riverside, has identified a microscopic process of electron spin dynamics in nanoparticles that could impact the design of applications in medicine, quantum computation, and spintronics.

Physicists simulate critical 'reheating' period that kickstarted the Big Bang

As the Big Bang theory goes, somewhere around 13.8 billion years ago the universe exploded into being, as an infinitely small, compact fireball of matter that cooled as it expanded, triggering reactions that cooked up the first stars and galaxies, and all the forms of matter that we see (and are) today.

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