ScienceDaily Physics News Feeds

  • Motorized droplets thanks to feedback effects
    on October 19, 2021 at 3:05 pm

    Physicists have examined a special system of colloidal particles that they activated using laser light. The researchers discovered that self-propelling droplets, which they have named ‘droploids’, formed which contain the particles as an internal motor.

  • Breakthrough proof clears path for quantum AI
    on October 18, 2021 at 7:42 pm

    Convolutional neural networks running on quantum computers have generated significant buzz for their potential to analyze quantum data better than classical computers can.

  • Uncovering the secrets of ultra-low frequency gravitational waves
    on October 18, 2021 at 3:25 pm

    New methods of detecting ultra-low frequency gravitational waves can be combined with other, less sensitive measurements to deliver fresh insights into the early development of our universe, according to researchers.

  • Bridging optics and electronics
    on October 14, 2021 at 5:11 pm

    Researchers have developed a simple spatial light modulator made from gold electrodes covered by a thin film of electro-optical material that changes its optical properties in response to electric signals.

  • Quarks and antiquarks at high momentum shake the foundations of visible matter
    on October 13, 2021 at 7:22 pm

    Two independent studies have illuminated unexpected substructures in the fundamental components of all matter. Preliminary results using a novel tagging method could explain the origin of the longstanding nuclear paradox known as the EMC effect. Meanwhile, authors will share next steps after the recent observation of asymmetrical antimatter in the proton.

  • Precise measurement of neutron lifetime
    on October 13, 2021 at 5:16 pm

    Physicists have made the most precise measurement of the neutron’s lifetime, which may help answer questions about the early universe.

  • Longstanding magnetic materials classification problem solved
    on October 13, 2021 at 3:40 pm

    For over 100 years, physicists, chemists, and materials scientists have developed extensive theoretical and experimental machinery to predict and characterize the electronic properties of magnetic materials, but even the most successful classification system, developed almost 75 years ago by Lev Shubnikov, was incomplete. An international team of researchers announced this week that it has finally been completed.

  • How to force photons to never bounce back
    on October 13, 2021 at 3:40 pm

    Scientists have developed a topology-based method that forces microwave photons to travel along on way path, despite unprecedented levels of disorder and obstacles on their way. This discovery paves the way to a new generation of high-frequency circuits and extremely robust, compact communication devices.

  • Direct photons offer glimpse of gluons’ dynamic motion
    on October 12, 2021 at 10:57 pm

    Scientists seeking to explore the teeming microcosm of quarks and gluons inside protons and neutrons report new data delivered by particles of light. The light particles, or photons, come directly from interactions of a quark in one proton colliding with a gluon in another at the Relativistic Heavy Ion Collider (RHIC). By tracking these ‘direct photons,’ scientists say they are getting a glimpse — albeit a blurry one — of gluons’ transverse motion within the building blocks of atomic nuclei.

  • A 5-sigma standard model anomaly is possible
    on October 12, 2021 at 7:47 pm

    One of the best chances for proving beyond-the-standard-model physics relies on something called the Cabibbo-Kobayashi-Maskawa (CKM) matrix. The standard model insists that the CKM matrix, which describes the mixing of quarks, should be unitary. But growing evidence suggests that during certain forms of radioactive decay, the unitarity of the CKM matrix might break.

  • To find sterile neutrinos, think small
    on October 12, 2021 at 7:47 pm

    Experiments have spotted anomalies hinting at a new type of neutrino, one that would go beyond the standard model of particle physics and perhaps open a portal to the dark sector. But no one has ever directly observed this hypothetical particle.

  • Professor uncovers surprising results from nuclear reactions inside stars
    on October 12, 2021 at 7:22 pm

    Where do our elements come from? And how are they made? New research is flipping the script on those age-old nuclear astrophysics questions. The truth is out there — several light years away among the stars, to be exact.

  • New nanostructure could be the key to quantum electronics
    on October 12, 2021 at 1:50 pm

    A novel electronic component could be an important key to the era of quantum information technology: Using a tailored manufacturing process, pure germanium is bonded with aluminum in a way that atomically sharp interfaces are created.

  • Ultrafast and coupled: Atomic vibrations in the quantum material boron nitride
    on October 12, 2021 at 1:50 pm

    Materials consisting of a few atomic layers display properties determined by quantum physics. In a stack of such layers, vibrations of the atoms can be triggered by infrared light. New experimental and theoretical work shows that atomic vibrations within the layers of hexagonal boron nitride, the so-called transverse optical phonons, couple directly to motions of the layers against each other. For a period of some 20 ps, the coupling results in a frequency down-shift of the optical phonons and their optical resonance. This behavior is a genuine property of the quantum material and of interest for applications in high-frequency optoelectronics.

  • Teaching ancient brains new tricks
    on October 11, 2021 at 3:08 pm

    Scientists have found a way to decode the brain activity associated with individual abstract scientific concepts pertaining to matter and energy, such as fermion or dark matter.

  • Photon-phonon breakthrough
    on October 8, 2021 at 8:05 pm

    New research has uncovered a novel way to combine two different states of matter. For one of the first times, topological photons — light — has been combined with lattice vibrations, also known as phonons, to manipulate their propagation in a robust and controllable way.

  • Sensitive new way of detecting transistor defects
    on October 8, 2021 at 8:05 pm

    Researchers have devised and tested a new, highly sensitive method of detecting and counting defects in transistors — a matter of urgent concern to the semiconductor industry as it develops new materials for next-generation devices.

  • A better black hole laser may prove a circuitous ‘Theory of Everything’
    on October 8, 2021 at 2:57 pm

    Researchers propose quantum circuit black hole lasers to explore Hawking radiation.

  • Ruling electrons and vibrations in a crystal with polarized light
    on October 8, 2021 at 2:57 pm

    The quantum behavior of atomic vibrations excited in a crystal using light pulses has much to do with the polarization of the pulses, say materials scientists. The findings from their latest study offer a new control parameter for the manipulation of coherently excited vibrations in solid materials at the quantum level.

  • Quantum networking milestone in real-world environment
    on October 7, 2021 at 4:21 pm

    A team has developed and demonstrated a novel, fully functional quantum local area network, or QLAN, to enable real-time adjustments to information shared with geographically isolated systems using entangled photons passing through optical fiber.

  • Getting up to speed on the proton
    on October 6, 2021 at 8:01 pm

    A century ago, scientists first detected the proton in the atomic nucleus. Yet, much about its contents remains a mystery. Scientists report a new theory for understanding what’s inside protons moving at the speed of light.

  • Catalysts found to convert carbon dioxide to fuel
    on October 6, 2021 at 3:27 pm

    The goal of tackling global warming by turning carbon dioxide into fuel could be one step closer with researchers using a supercomputer to identify a group of ‘single-atom’ catalysts that could play a key role.

  • Skyrmion research: Braids of nanovortices discovered
    on October 6, 2021 at 3:26 pm

    A team of scientists has discovered a new physical phenomenon: complex braided structures made of tiny magnetic vortices known as skyrmions. Skyrmions were first detected experimentally a little over a decade ago and have since been the subject of numerous studies, as well as providing a possible basis for innovative concepts in information processing that offer better performance and lower energy consumption. Furthermore, skyrmions influence the magnetoresistive and thermodynamic properties of a material. The discovery therefore has relevance for both applied and basic research.

  • New measurement method promises spectacular insights into the interior of planets
    on October 5, 2021 at 4:48 pm

    At the heart of planets, extreme states are to be found: temperatures of thousands of degrees, pressures a million times greater than atmospheric pressure. They can therefore only be explored directly to a limited extent — which is why the expert community is trying to use sophisticated experiments to recreate equivalent extreme conditions. Researchers have adapted an established measurement method to these extreme conditions and tested it successfully: Using the light flashes of the world’s strongest X-ray laser the team managed to take a closer look at the important element, carbon, along with its chemical properties.

  • New type of magnetism unveiled in an iconic material
    on October 5, 2021 at 4:47 pm

    Scientists have made a path-breaking discovery in strontium ruthenate — with potential for new applications in quantum electronics.

  • Trapping light with disorder
    on October 5, 2021 at 2:19 pm

    Researchers have demonstrated disorder-induced localization, a rather difficult wave phenomenon to observe, but also one of the most striking and puzzling manifestations of wave interference predicted by Nobel Prize laureate P.W. Anderson for electrons and, later, generalized to light waves.

  • Ultra-short flashes of light illuminate a possible path to future beyond-CMOS electronics
    on October 5, 2021 at 2:19 pm

    Researchers have demonstrated that ultra-short pulses of light, down to 34 millionths of a billionth of a second, elicit the same response as continuous illumination. The experiment harnessed interactions between real and virtual states to ‘switch’ the electronic state of an atomically-thin (2D) material, tungsten-disulfide, aiding the search for future low-energy electronics based on exotic topological materials.

  • Breakup of a single chemical bond measured
    on October 5, 2021 at 12:34 am

    Using advanced microscopy techniques, researchers have recorded the breaking of a single chemical bond between a carbon atom and an iron atom on different molecules.

  • Induced flaws in quantum materials could enhance superconducting properties
    on October 4, 2021 at 3:51 pm

    In a surprising discovery, an international team of scientists found that deformations in quantum materials that cause imperfections in the crystal structure can actually improve the material’s superconducting and electrical properties.

  • Sandwich-style construction: Toward ultra-low-energy exciton electronics
    on October 4, 2021 at 2:42 pm

    A new ‘sandwich-style’ fabrication process placing a semiconductor only one atom thin between two mirrors has allowed Australian researchers to make a significant step towards ultra-low energy electronics based on the light-matter hybrid particles exciton-polaritons. The breakthrough evidence of robust, dissipationless propagation of exciton-polaritons, coupled excitons in atomically-thin material to light, demonstrating for the first time long-range propagation without lost dissipation of energy, at room temperature.

  • Scientists capture the fleeting transition of water into a highly reactive state
    on October 2, 2021 at 4:30 pm

    Researchers have uncovered a key step in the ionization of liquid water using the lab’s high-speed ‘electron camera,’ MeV-UED. This reaction is of fundamental significance to a wide range of fields, including nuclear engineering, space travel, cancer treatment and environmental remediation.

  • Two-dimensional hybrid metal halide device allows control of terahertz emissions
    on October 1, 2021 at 7:27 pm

    Researchers have utilized two-dimensional hybrid metal halides in a device that allows directional control of terahertz radiation generated by a spintronic scheme. The device has better signal efficiency than conventional terahertz generators, and is thinner, lighter and less expensive to produce.

  • How flawed diamonds ‘lead’ to flawless quantum networks
    on October 1, 2021 at 2:04 pm

    Lead-based vacancy centers in diamonds that form after high-pressure and high-temperature treatment are ideal for quantum networks, find scientists. The modified crystal system could also find applications in spintronics and quantum sensors.

  • Connecting the dots between material properties and qubit performance
    on September 30, 2021 at 6:07 pm

    Scientists studying superconducting qubits identified structural and chemical defects that may be causing quantum information loss — an obstacle to practical quantum computation.

  • Correlated electrons ‘tango’ in a perovskite oxide at the extreme quantum limit
    on September 29, 2021 at 7:41 pm

    Scientists have found a rare quantum material in which electrons move in coordinated ways, essentially ‘dancing.’ Straining the material creates an electronic band structure that sets the stage for exotic, more tightly correlated behavior — akin to tangoing — among Dirac electrons, which are especially mobile electric charge carriers that may someday enable faster transistors.

  • Quantum dots enable infrared lasing at room temperature for silicon photonics
    on September 29, 2021 at 3:28 pm

    Researchers report on having achieved a solution-processed infrared laser at room temperature compatible with CMOS technology and tunable to emit in the telecommunications window.

  • Extending the power of attosecond spectroscopy
    on September 29, 2021 at 2:18 pm

    Scientists have shown that the powerful transient absorption spectroscopy technique can unravel ultrafast motion of electrons and nuclei in a molecule in real time and with atomic spatial resolution.

  • Photonic chip is key to ‘nurturing’ quantum computers
    on September 29, 2021 at 2:18 pm

    Quantum computers are gaining pace. They promise to provide exponentially more computing power for certain very tricky problems. They do this by exploiting the peculiar behaviour of quantum particles, such as photons of light. A team has now shown how to protect qubits from errors using photons in a silicon chip.

  • Tweaking alloy microchemistry for flawless metal 3D printing
    on September 28, 2021 at 3:24 pm

    In the last few decades, metal 3D printing has spearheaded the efforts in creating custom parts of intricate shapes and high functionality. But as additive manufacturers have included more alloys for their 3D printing needs, so have the challenges in creating uniform, defect-free parts.

  • Will twisted superconducting flakes make better components for quantum computers?
    on September 28, 2021 at 2:22 pm

    Researchers have found a way to make ‘single-crystal flake’ devices that are so thin and free of defects, they have the potential to outperform components used today in quantum computer circuits.

  • Microscopic metavehicles powered by nothing but light
    on September 28, 2021 at 11:50 am

    Researchers have succeeded in creating tiny vehicles powered by nothing but light. By layering an optical metasurface onto a microscopic particle, and then using a light source to control it, they succeeded in moving the tiny vehicles in a variety of complex and precise ways — and even using them to transport other objects.

  • Creating order by mechanical deformation in dense active matter
    on September 27, 2021 at 9:29 pm

    Living or biological systems cannot be easily understood using the standard laws of physics, such as thermodynamics, as scientists would for gases, liquids or solids. Living systems are active, demonstrating fascinating properties such as adapting to their environment or repairing themselves. Exploring the questions posed by living systems using computer simulations, researchers have now discovered a novel type of ordering effect generated and sustained by a simple mechanical deformation, specifically steady shear.

  • Ultrathin quantum dot LED that can be folded freely as paper
    on September 27, 2021 at 3:05 pm

    Scientists have unveiled an ultrathin quantum dot LED that can be folded as freely as paper. The new device can be folded into complex 3D structures such as butterflies, airplanes, and pyramids.

  • ‘Back to basics’ approach helps unravel new phase of matter
    on September 27, 2021 at 12:22 pm

    A new phase of matter, thought to be understandable only using quantum physics, can be studied with far simpler classical methods.

  • Researchers develop new method for detecting superfluid motion
    on September 24, 2021 at 10:25 pm

    Researchers are part of a new study that could help unlock the potential of superfluids — essentially frictionless special substances capable of unstopped motion once initiated.

  • 3D nano-inks push industry boundaries
    on September 24, 2021 at 10:25 pm

    A new, 3D-printable polymer nanocomposite ink developed by engineers has incredible properties like conducting electricity and high tensile strength — and many applications in aerospace, medicine and electronics.

  • New technique speeds measurement of ultrafast pulses
    on September 24, 2021 at 2:43 pm

    Researchers have developed a time-domain single-pixel imaging technique to speed the measurement of ultrafast pulses in infrared and far infrared wavelengths.

  • Tiny lasers acting together as one: Topological vertical cavity laser arrays
    on September 24, 2021 at 2:42 pm

    An international research team uses topological platform to demonstrate coherent array of vertical lasers.

  • Physicists control the flow of electron pulses through a nanostructure channel
    on September 23, 2021 at 3:56 pm

    Particle accelerators are essential tools in research areas such as biology, materials science and particle physics. Researchers are always looking for more powerful ways of accelerating particles to improve existing equipment and increase capacities for experiments. One such powerful technology is dielectric laser acceleration (DLA). In this approach, particles are accelerated in the optical near-field which is created when ultra-short laser pulses are focused on a nanophotonic structure. Using this method, researchers have succeeded in guiding electrons through a vacuum channel, an essential component of particle accelerators.

  • Observation of energy-difference conservation in optical domain
    on September 23, 2021 at 3:56 pm

    A research team proposes an efficient experimental platform for non-Hermitian physics research.

  • Switching on a superfluid
    on September 23, 2021 at 2:20 pm

    We can learn a lot by studying microscopic and macroscopic changes in a material as it crosses from one phase to another, for example from ice to water to steam. A new study examines systems transitioning from ‘normal’ fluid to a quantum state known as a superfluid, which can flow with zero friction, with a view to future, superfluid-based, quantum technologies, such as ultra-low energy electronics.

  • Researchers mimic how water and wind create complex shapes in nature
    on September 22, 2021 at 6:32 pm

    Researchers have found a way to mimic the natural processes that create complex shapes and landscapes with the help of a vibrating plate and resulting energy fields.

  • Quantum cryptography Records with Higher-Dimensional Photons
    on September 22, 2021 at 4:18 pm

    A new and much faster quantum cryptography protocol has been developed: Usually, quantum cryptography is done with photons that can be in two different states. Using eight different states, cryptographic keys can be generated much faster and with much more robustness against interference.

  • Carbon fibers electrical measurements pave way for lightning strike protection technologies
    on September 21, 2021 at 9:27 pm

    Carbon fiber reinforced polymer composite structures are important in several industries, yet the electrical behavior of a composite is challenging to measure or predict because of the electrical conductivity of constituent carbon fibers and the composite’s complex hierarchical microstructure. Researchers report a direct measurement of the transverse electrical resistivity of a single carbon fiber. The researchers combined a precise sample preparation with a technique called the van der Pauw method to accomplish this challenging measurement.

  • Electrons on the edge: The story of an intrinsic magnetic topological insulator
    on September 21, 2021 at 9:26 pm

    An intrinsic magnetic topological insulator MnBi2Te4 has been discovered with a large band gap, making it a promising material platform for fabricating ultra-low-energy electronics and observing exotic quantum phenomena.

  • Engineering researchers develop new explanation for formation of vortices in 2D superfluid
    on September 21, 2021 at 7:42 pm

    Researchers have new insight about the formation of vortices in a type of quantum fluid, work that could help our comprehension of the physics mystery of how vortex clusters form and provide valuable understanding into the atmospheric swirling motion on planets such as Earth and Jupiter.

  • Nano-scale discovery could help to cool down overheating in electronics
    on September 20, 2021 at 7:20 pm

    When you shrink down to very small scales, heat doesn’t always behave the way you think it should. Now, new findings from the nano realm could help researchers to gain a better handle on the flow of heat in electronic devices.

  • Physicists probe light smashups to guide future research
    on September 20, 2021 at 7:20 pm

    Light has no mass, but Europe’s Large Hadron Collider (LHC) can convert light’s energy into massive particles. Physicists studied matter-generating collisions of light and showed the departure angle of their debris is subtly distorted by quantum interference patterns in the light prior to collision. Their findings will help physicists accurately interpret future experiments aimed at finding ‘new physics’ beyond the Standard Model.

  • A sandblaster at the atomic level
    on September 20, 2021 at 4:17 pm

    Modifying surfaces by shooting particles at them – this technique, called ‘sputtering’, is indispensable in surface science. However, if the surface is not perfectly smooth and regular, it is hard to predict the result of the sputtering process. Scientists have now managed to explain the effect of particles on rough surfaces during sputtering – with implications for fusion research and even astrophysics.

  • All-nitride superconducting qubit made on a silicon substrate
    on September 20, 2021 at 2:09 pm

    Researchers have succeeded in developing an all-nitride superconducting qubit using epitaxial growth on a silicon substrate that does not use aluminum as the conductive material. This qubit uses niobium nitride (NbN) with a superconducting transition temperature of 16 K (-257 °C) as the electrode material, and aluminum nitride (AlN) for the insulating layer of the Josephson junction. It is a new type of qubit made of all-nitride materials grown epitaxially on a silicon substrate and free of any amorphous oxides, which are a major noise source. By realizing this new material qubit on a silicon substrate, long coherence times have been obtained: an energy relaxation time (T1) of 16 microseconds and a phase relaxation time (T2) of 22 microseconds as the mean values. This is about 32 times T1 and about 44 times T2 of nitride superconducting qubits grown on a conventional magnesium oxide substrate.