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Optical barcodes expand range of high-resolution sensor

26 avril

The same geometric quirk that lets visitors murmur messages around the circular dome of the whispering gallery at St. Paul’s Cathedral in London or across St. Louis Union Station’s whispering arch also enables the construction of high-resolution optical sensors. Whispering-gallery-mode (WGM) (…)

The end of the quantum tunnel : Exact instanton transseries for quantum mechanics

26 avril

In the quantum world, processes can be separated into two distinct classes. One class, that of the so-called "perturbative" phenomena, is relatively easy to detect, both in an experiment and in a mathematical computation. Examples are plentiful : the light that atoms emit, the energy (…)

Enhanced superconductivity in monolayer FeSe films on SrTiO&#8323 ;(001) via metallic δ-doping

26 avril

Interface engineering has been proven to be effective in discovering new quantum states, such as topological states, superconductivity, charge density waves, magnetism, etc., which require atomic-scale heterostructure fabrication. Monolayer FeSe on SrTiO3 substrates has attracted intense (…)

Unveiling a new quantum frontier : Frequency-domain entanglement

26 avril

Scientists have introduced a form of quantum entanglement known as frequency-domain photon number-path entanglement. This advance in quantum physics involves an innovative tool called a frequency beam splitter, which has the unique ability to alter the frequency of individual photons with a (…)

Large Hadron Collider experiment zeroes in on magnetic monopoles

26 avril

The late physicist Joseph Polchinski once said the existence of magnetic monopoles is "one of the safest bets that one can make about physics not yet seen." In its quest for these particles, which have a magnetic charge and are predicted by several theories that extend the Standard (…)

Scientists capture X-rays from upward positive lightning

26 avril

Globally, lightning is responsible for over 4,000 fatalities and billions of dollars in damage every year ; Switzerland itself weathers up to 150,000 strikes annually. Understanding exactly how lightning forms is key for reducing risk, but because lightning phenomena occur on sub-millisecond (…)

Research demonstrates a new mechanism of order formation in quantum systems

26 avril

Researchers Kazuaki Takasan and Kyogo Kawaguchi of the University of Tokyo with Kyosuke Adachi of RIKEN, Japan, have demonstrated that ferromagnetism, an ordered state of atoms, can be induced by increasing particle motility and that repulsive forces between atoms are sufficient to maintain it.

Scientists simulate magnetization reversal of Nd-Fe-B magnets using large-scale finite element models

26 avril

NIMS has succeeded in simulating the magnetization reversal of Nd-Fe-B magnets using large-scale finite element models constructed based on tomographic data obtained by electron microscopy.

Quasi-2D spin-Peierls transition through interstitial anionic electrons in K(NH₃)₂

25 avril

In a paper published in Science Bulletin, a Chinese team of scientists predicts a novel electride K(NH3)2, with interstitial electrons distributed at cages formed by six ammonia molecules and forming a quasi-2D triangular lattice. They have revealed that this material undergoes a spin-Peierls (…)

IRIS beamline at BESSY II gets a new nanospectroscopy end station

25 avril

The IRIS infrared beamline at the BESSY II storage ring now offers a fourth option for characterizing materials, cells and even molecules on different length scales. The team has extended the IRIS beamline with an end station for nanospectroscopy and nanoimaging that enables spatial (…)