Search results for dirac

Astronomy Jul 31, 2023

New algorithm ensnares its first 'potentially hazardous' asteroid

An asteroid discovery algorithm—designed to uncover near-Earth asteroids for the Vera C. Rubin Observatory's upcoming 10-year survey of the night sky—has identified its first "potentially hazardous" asteroid, a term for ...

Quantum Physics Jul 14, 2023

Study offers a broader approach to quantum walks

Quantum walks have been widely studied for their ability to simulate real physical phenomena. Physicists have previously studied two distinct types of quantum walk, but so far, they haven't widely considered how their mathematical ...

Astronomy Jul 13, 2023

New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed

Our universe could be twice as old as current estimates, according to a new study that challenges the dominant cosmological model and sheds new light on the so-called "impossible early galaxy problem."

Condensed Matter Jul 10, 2023

A surprising discovery about the magnetic interactions in a Kagome layered topological magnet

A team from Ames National Laboratory conducted an in-depth investigation of the magnetism of TbMn6Sn6, a Kagome layered topological magnet. They were surprised to find that the magnetic spin reorientation in TbMn6Sn6 occurs ...

Optics & Photonics Jul 7, 2023

An inhomogeneous Dirac cone system gives rise to in-plane chiral Landau levels

Chiral zeroth Landau levels are topologically protected bulk states that propagate in a single direction. In the field of quantum field theory and condensed matter physics, these levels are crucial for breaking chiral symmetry ...

Optics & Photonics Jun 19, 2023

Trillionths of a second: Photon pairs compress an electron beam into short pulses

Physicists at the University of Konstanz have generated one of the shortest signals ever produced by humans: Using paired laser pulses, they succeeded in compressing a series of electron pulses to a numerically analyzed duration ...

Condensed Matter Jun 16, 2023

Mapping the curvature where electrons reside in Kagome materials

Kagome metals are a class of quantum materials with interesting properties that are characterized by a unique lattice structure resembling Japanese woven bamboo patterns of the same name (i.e., Kagome). Over the past decade, ...

Nanophysics Jun 15, 2023

Ultrafast and tunable conversion of high-frequency signals into visible light

A study carried out by a research team from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), the Catalan Institute of Nanoscience and Nanotechnology (ICN2), University of Exeter Centre for Graphene Science, and TU Eindhoven ...

Nanophysics May 17, 2023

Researchers use structured light on a chip in another photonics breakthrough

In everyday life we experience light in one of its simplest forms—optical rays or beams. However, light can exist in much more exotic forms. Thus, even beams can be shaped to take the form of spirals; so-called vortex beams, ...

Nanophysics May 11, 2023

With new experimental method, researchers probe spin structure in 2D materials for first time

For two decades, physicists have tried to directly manipulate the spin of electrons in 2D materials like graphene. Doing so could spark key advances in the burgeoning world of 2D electronics, a field where super-fast, small ...

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