Physics

Supercomputers without waste heat

Generally speaking, magnetism and the lossless flow of electrical current ("superconductivity") are competing phenomena that cannot coexist in the same sample. However, for building supercomputers, synergetically combining both states comes with major advantages as compared to today's semiconductor technology, characterized by high power consumption and heat production. Researchers from the Department of Physics at the University of Konstanz have now demonstrated that the lossless electrical transfer of magnetically encoded information is possible.

Milestone for bERLinPro: Photocathodes with high quantum efficiency

Teams from the accelerator physics and the SRF groups at HZB are developing a superconducting linear accelerator featuring energy recovery (Energy Recovery Linac) as part of the bERLinPro project. It accelerates an intense electron beam that can be used for applications like generating brilliant synchrotron radiation. After use, the electron bunches are directed back to the superconducting linear accelerator, where they release almost all their remaining energy. This energy is then available for accelerating new electron bunches.

A new 'spin' on kagome lattices

Like so many targets of scientific inquiry, the class of material referred to as the kagome magnet has proven to be a source of both frustration and amazement. Further revealing the quantum properties of the kagome magnet is seen as one of the primary challenges in fundamental physics—to both theorists and experimentalists.

A new 'spin' on kagome lattices

The kagome ferromagnet Fe3Sn2 exhibits an electronic state that couples unusually strongly to an applied magnetic field that can be rotated to point in any direction of a 3-dimensional space, revealing that magnetization drives -- in quantum scale -- a 'giant' energy shift within the material, an international team of researchers has found.

Harnessing the power of 'spin orbit' coupling in silicon: Scaling up quantum computation

Research teams are investigating multiple pathways to scale up atom-based computing architectures using spin-orbit coupling -- advancing towards their goal of building a silicon-based quantum computer.

Scientists exchanged quantum information on daylight in a free-space quantum key distribution

Scientists have reported a successful free-space quantum key distribution (QKD) in daylight with the self-developed polarization encoding chip for the first time. QKD is one of the most promising secure communication technologies, which encodes information into a single-photon, the smallest measurable unit of light. By using the quantum mechanical properties of the single-photon, quantum cryptography guarantees secure information exchange between the distant parties.

Iron-rich lamellae in the semiconductor

There is often a pronounced symmetry when you look at the lattice of crystals: the atoms are uniformly arranged. This behavior was also to be expected by a crystal, which physicists from Germany and Poland produced: a compound from an indium arsenide semiconductor, spiked with some iron. The material, however, did not adhere to perfect symmetry. The iron formed two-dimensional, lamellar-shaped structures in the crystal that lent the material a striking property: it became magnetic.

NASA InSight Lander 'Hears' Martian Winds

NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander, which touched down on Mars just 10 days ago, has provided the first ever "sounds" of Martian winds on the Red Planet. A media teleconference about these sounds will be held today at 12:30 p.m. EST (9:30 a.m. PST).

Hunting for rare isotopes: The mysterious radioactive atomic nuclei that will be in tomorrow's technology

When you hear the term "radioactive" you likely think "bad news," maybe along the lines of fallout from an atomic bomb.

NASA TV to Air ‘Spirit of Apollo’ Tribute from National Cathedral

This month marks the 50th anniversary of NASA’s Apollo 8 mission, which was the first to bring humans to another world as they orbited the Moon on Christmas Eve, 1968.

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