Physics

Thermodynamic magic enables cooling without energy consumption

Physicists at the University of Zurich have developed an amazingly simple device that allows heat to flow temporarily from a cold to a warm object without an external power supply. Intriguingly, the process initially appears to contradict the fundamental laws of physics.

Triplet superconductivity demonstrated under high pressure

Researchers have demonstrated a theoretical type of unconventional superconductivity in a uranium-based material, according to a new study.

Study outlines new proposal for probing the primordial universe

Most everybody is familiar with the Big Bang—the notion that an impossibly hot, dense universe exploded into the one we know today. But what do we know about what came before?

New book traces expeditions to test Einstein's theory of relativity

No Shadow of a Doubt, a new book by Daniel Kennefick, associate professor of physics at the University of Arkansas, tells the story of two research teams, organized by Arthur Stanley Eddington and Sir Frank Watson Dyson, who tested Einstein's theory of relativity. These expeditions traveled to Brazil and Africa to collect images of stars during the 1919 eclipse, and their results confirmed and brought mainstream attention to the theory.

Coincidence helps with quantum measurements

Through randomly selected measurements, physicists can determine the quantum entanglement of many-particle systems. With the newly developed method, quantum simulations can be extended to a larger number of quantum particles. Researchers now report on the first successful demonstration of this method.

Exploring what happens inside fires and explosions

The inside of a fire might be the last place one would explore, but a new method to do just that could lead to advances in fighting fires, creating cleaner engines and even space travel.

CEBAF turns on the charm

The world's most advanced particle accelerator for investigating the quark structure of the atom's nucleus has just charmed physicists with a new capability. The production of charm quarks in J/ψ (J/psi) particles by CEBAF at the Department of Energy's Thomas Jefferson National Accelerator Facility confirms that the facility has expanded the realm of precision nuclear physics research with electron beams to higher energies.

Lasers make magnets behave like fluids

For years, researchers have pursued a strange phenomenon: When you hit an ultra-thin magnet with a laser, it suddenly de-magnetizes. Imagine the magnet on your refrigerator falling off.

Spin flipper upends protons

Protons spin. It's an intrinsic property that can affect experiments at accelerators that use beams of protons. Yet flipping proton spins could offer insights into nuclear physics experiments that study the first moments of the universe in a laboratory setting. A new "spin flipper" magnet assembly efficiently reverses the spin direction of protons circulating in the Relativistic Heavy Ion Collider (RHIC). These flips change the particle's spin with 97 percent efficiency without changing other beam characteristics.

Researchers report observation of room-temperature polar skyrmions

An international team of researchers has discovered a way to create and observe room-temperature polar skyrmions. In their paper published in the journal Nature, the group describes creating the polar skyrmions and their observations. Pavlo Zubko, with the London Centre for Nanotechnology, has published a News and Views piece on the work done by the team in the same journal issue.

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