Graphene has many extraordinary mechanical and electronic properties, but it's not magnetic. To make it so, the simplest strategy is to modify its electronic structure to create unpaired electrons. Researchers can do that by, for example, removing individual carbon atoms or adsorbing hydrogen onto graphene. This has to be done in a very controlled way because of a peculiarity of the graphene's crystal lattice, which consists of two sublattices. Gonzales-Herrero et al. deposited a single hydrogen atom on top of graphene and used scanning tunneling microscopy to detect magnetism on the sublattice lacking the deposited atom (see the Perspective by Hollen and Gupta).
The same image shown using different analysis methods. Defects that don't exist are shown in purple, and defects that weren't identified are orange. In mere hours, researchers created a neural network that performed as well as a human expert, demonstrating MENNDL's ability to significantly reduce the time to analyze electron microscopy images. Finding defects in electron microscopy images takes months. It's called MENNDL, the Multinode Evolutionary Neural Networks for Deep Learning.
From medicines to car parts, counterfeit products are a huge problem around the world, costing nearly £370 billion ($0.5 trillion) in lost revenue every year. In the hope of combating the issue, scientists are turning to quantum technology. Researchers have created an authentication tag that is just one atom thick, and could be placed into products to allow people to spot fake goods. Researchers have created a graphene authentication tag that is just one atom thick, and could be placed into products to allow people to spot fake goods. Pictured is a 3D illustration of graphene's atomic structure Researchers have created unique atomic-scale IDs that could be used in a range of sectors, including aerospace parts or luxury goods.
Quantum computers manipulate qubits, which can encode zeroes and ones simultaneously. In theory, the devices could vastly outperform conventional computers at certain tasks. But in the race to build a practical quantum computer, investment has largely gone to qubits built on silicon, such as superconducting circuits and quantum dots. Now, two recent studies have demonstrated the promise of neutral atom qubits. In one study, a quantum logic gate made of two neutral atoms was shown to work with far fewer errors than ever before.
After decades as laboratory curiosities, some of quantum physics' oddest effects are beginning to be put to use, says Jason Palmer PATRICK GILL, a director of the new Quantum Metrology Institute at Britain's National Physical Laboratory (NPL) in south-west London and an expert in atomic clocks, points to a large table full of lenses and mirrors, vacuum chambers and electronics. "And there's a smaller one over there," he says. NPL is part of a consortium of the planet's official timekeepers. In all its atomic-clock laboratories, each of the flagship devices--some of which are huge--is flanked by a smaller one under construction. Miniaturisation is the name of the game.