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The dark matter particle explorer has measured high-precision cosmic ray helium energy spectrum

Credit: DAMPE Collaboration
Dark Matter Particle Explorer (DAMPE) Collaboration directly observed a spectral softening of helium nuclei at about 34TeV for the first time. This work was based on measurements data of the helium spectrum with kinetic energies from 70 GeV to 80 TeV (17.5 GeV/n to 20 TeV/n for per nucleon) recorded by the DAMPE.
The relevant results were published in
Physical Review Letters.
Galactic cosmic rays (GCRs) offers important ways to deeply understand the astrophysical particle origin and accelerators and the interstellar medium of the Galaxy. Helium nuclei, the second most abundant nuclear element of cosmic rays, is a distinguishing feature of space. ....

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Using the environment to control quantum devices

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Singapore University of Technology and Design (SUTD) researchers have uncovered how the environment can impact highly sensitive quantum behaviours like localisation. Their findings, published in
Chaos, could lead to future innovations in the design of superconducting materials and quantum devices, including super precise sensors.
Quantum technology, in particular quantum sensing, promises to measure and capture our world at levels of precision never before possible. Such precision has diverse applications, from speedier and more sensitive medical imaging to recording time on high-frequency market trades, and even the development of sensors that can determine whether the ground beneath us is solid rock or a natural oil-and-gas reservoir. ....

Dario Poletti , Xiansong Xu , Singapore University Of Technology , Singapore University , Associate Professor Dario Poletti , Chemistry Physics Materials Sciences , Atomic Molecular Particle Physics , Technology Engineering Computer Science , Nanotechnology Micromachines , Research Development , Tomic Physics , சிங்கப்பூர் பல்கலைக்கழகம் ஆஃப் தொழில்நுட்பம் , சிங்கப்பூர் பல்கலைக்கழகம் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,

Scientists overhear two atoms chatting

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IMAGE: Artist s impression of the experiment, where an electric pulse is applied to a titanium atom. As a result, its magnetic moment suddenly flips around. A neighbouring titanium atom (right) reacts.
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Credit: TU Delft/Scixel
How materials behave depends on the interactions between countless atoms. You could see this as a giant group chat in which atoms are continuously exchanging quantum information. Researchers from Delft University of Technology in collaboration with RWTH Aachen University and the Research Center Jülich have now been able to intercept a chat between two atoms. They present their findings in
Science on 28 May. ....

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Astonishing quantum experiment in Science raises questions

Quantum systems are considered extremely fragile. Even the smallest interactions with the environment can result in the loss of sensitive quantum effects. In the renowned journal Science, however, researchers from TU Delft, RWTH Aachen University and Forschungszentrum Jülich now present an experiment in which a quantum system consisting of two coupled atoms behaves surprisingly stable. ....

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It takes some heat to form ice!

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IMAGE: The study results of Anton Tamtögl et al lead to a completely new understanding of ice formation: Water molecules require additional energy before they freeze into ice.
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Credit: © Lunghammer - TU Graz
Water freezes and turns to ice when brought in contact with a cold surface - a well-known fact. However, the exact process and its microscopic details remained elusive up to know. Anton Tamtögl from the Institute of Experimental Physics at TU Graz explains: The first step in ice formation is called nucleation and happens in an incredibly short length of time, a fraction of a billionth of a second, when highly mobile individual water molecules find each other and coalesce. Conventional microscopes are far too slow to follow the motion of water molecules and so it is impossible to use them to watch how molecules combine on top of solid surfaces. ....

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