ScienceDaily Physics News Feeds

  • Decades of research brings quantum dots to brink of widespread use
    on August 5, 2021 at 7:47 pm

    A new article gives an overview of almost three decades of research into colloidal quantum dots, assesses the technological progress for these nanometer-sized specs of semiconductor matter, and weighs the remaining challenges on the path to widespread commercialization for this promising technology with applications in everything from TVs to highly efficient sunlight collectors.

  • Quantum crystal could be a new dark matter sensor
    on August 5, 2021 at 6:11 pm

    Physicists have linked together, or ‘entangled,’ the mechanical motion and electronic properties of a tiny blue crystal, giving it a quantum edge in measuring electric fields with record sensitivity that may enhance understanding of the universe.

  • Mixing a cocktail of topology and magnetism for future electronics
    on August 5, 2021 at 3:54 pm

    A new review throws the spotlight on heterostructures of topological insulators and magnetic materials, where the interplay of magnetism and topology can give rise to exotic quantum phenomena that are promising building blocks for future low-power electronics. Provided suitable candidate materials are found, a ‘cocktail’ of topological physics and magnetism could produce these key states at room temperature and without any magnetic field, making them a viable ultra-low energy alternative to current, CMOS electronics.

  • Powering navigational buoys with help of ocean waves
    on August 5, 2021 at 1:01 am

    Traditionally used energy harvesting technologies, like photovoltaic panels or wind turbines, suffer from several limitations. In the absence of daylight and wind, neither of the two can supply any power. In the case of ocean buoys, a potential solution is omnipresent: wave energy. Abundant, predictable, and consistent, the ocean’s waves can be used to power navigation buoys. Researchers have developed sphere-based triboelectric nanogenerators that can be incorporated directly into navigational buoys to provide electricity from ocean waves.

  • New viable means of storing information for quantum technologies?
    on August 3, 2021 at 12:49 pm

    Quantum information could be behind the next technological revolution. By analogy with the bit in classical computing, the qubit is the basic element of quantum computing. However, demonstrating the existence of this information storage unit and using it remains complex, and hence limited. An international research team used theoretical calculations to show that it is possible to realize a new type of qubit, in which information is stored in the oscillation amplitude of a carbon nanotube.

  • Low-power dynamic manipulation of single nanoscale quantum objects
    on August 2, 2021 at 6:01 pm

    Electrical engineers are powering the quantum computing revolution with the development of an on-demand, scalable technique to manipulate nanoscale nanodiamonds.

  • Ultrafast X-ray provides new look at plasma discharge breakdown in water
    on July 30, 2021 at 6:20 pm

    Occurring faster than the speed of sound, the mystery behind the breakdown of plasma discharges in water is one step closer to being understood as researchers pursue applying new diagnostic processes using state-of-the-art X-ray imaging to the challenging subject.

  • Engineers bend light to enhance wavelength conversion
    on July 30, 2021 at 2:42 pm

    Engineers have developed a more efficient way of converting light from one wavelength to another, opening the door for improvements in the performance of imaging, sensing and communication systems.

  • Collisions of light produce matter/antimatter from pure energy
    on July 29, 2021 at 10:36 pm

    Scientists studying particle collisions have produced definitive evidence for two physics phenomena predicted more than 80 years ago: that matter/antimatter can be created directly by colliding photons and that a magnetic field can bend polarized light along different paths in a vacuum.

  • New information storage and processing device
    on July 29, 2021 at 10:35 pm

    A team of scientists has developed a means to create a new type of memory, marking a notable breakthrough in the increasingly sophisticated field of artificial intelligence.

  • The quantum refrigerator
    on July 29, 2021 at 4:21 pm

    By combining quantum theory and thermodynamics, it is possible to design a new kind of atomic refrigerator, which can cool down extremely cold Bose-Einstein-condensates even further.

  • Chaotic electrons heed ‘limit’ in strange metals
    on July 29, 2021 at 4:20 pm

    Chaos, to a point: A new study confirms the chaotic behavior of electrons in ‘strange’ metals has a limit established by the laws of quantum mechanics.

  • Spin-sonics: Acoustic wave gets the electrons spinning
    on July 29, 2021 at 1:52 pm

    Researchers have succeeded in detecting the rolling movement of a nano-acoustic wave predicted by the famous physicist and Nobel prize-winner Lord Rayleigh in 1885.

  • Superconductivity in high-Tc cuprates: ‘from maximal to minimal dissipation’ – a new paradigm?
    on July 28, 2021 at 3:13 pm

    Researchers used some of Europe’s strongest continuous magnetic fields to uncover evidence of exotic charge carriers in the metallic state of copper-oxide high-temperature superconductors (high-Tc cuprates). The team postulated that it is these exotic charge carriers that form the superconducting pairs, in marked contrast with expectations from conventional theory.

  • Magnetic ‘balding’ of black holes saves general relativity prediction
    on July 27, 2021 at 9:16 pm

    Magnetic fields around black holes decay quickly, researchers report. This finding backs up the so-called ‘no-hair conjecture’ predicted by Einstein’s general relativity.

  • Study shows why beer mats do not fly in a straight line
    on July 27, 2021 at 9:15 pm

    Anyone who has ever failed to throw a beer mat into a hat should take note: physicists have discovered why this task is so difficult. However, their study also suggests how to significantly increase accuracy and range.

  • Under pressure, ‘squishy’ compound reacts in remarkable ways
    on July 27, 2021 at 6:52 pm

    When a compound of manganese and sulfide (MnS2) is compressed in a diamond anvil, it transitions from an insulator into a metallic state and back into an insulator. This is accompanied by unprecedented decreases in resistance and volume across an extremely narrow range of pressure changes at room temperatue, say researchers.

  • Gaming graphics card allows faster, more precise control of fusion energy experiments
    on July 22, 2021 at 5:13 pm

    Researchers have developed a method that uses a gaming graphics card to control plasma formation in their prototype fusion reactor.

  • Antimatter from laser pincers
    on July 22, 2021 at 3:30 pm

    An international physics team has proposed a new concept that may allow selected cosmic extreme processes to be studied in the laboratory in the future. A special setup of two high-intensity laser beams could create conditions similar to those found near neutron stars, for example. An antimatter jet is generated and accelerated very efficiently, as the experts report.

  • Infrared held in a pincer
    on July 22, 2021 at 3:29 pm

    Many applications, from fiber-optic telecommunications to biomedical imaging processes require substances that emit light in the near-infrared range (NIR). A research team has now developed the first chromium complex that emits light in the coveted, longer wavelength NIR-II range. The team has introduced the underlying concept: a drastic change in the electronic structure of the chromium caused by the specially tailored ligands that envelop it.

  • New quantum research gives insights into how quantum light can be mastered
    on July 21, 2021 at 9:26 pm

    A team of scientists proposes that modulated quantum metasurfaces can control all properties of photonic qubits, a breakthrough that could impact the fields of quantum information, communications, sensing and imaging, as well as energy and momentum harvesting.

  • ‘Magic-angle’ trilayer graphene may be a rare, magnet-proof superconductor
    on July 21, 2021 at 6:19 pm

    Physicists have observed signs of a rare type of superconductivity in a material called ‘magic-angle’ twisted trilayer graphene. They report that the material exhibits superconductivity at surprisingly high magnetic fields of up to 10 Tesla, which is three times higher than what the material is predicted to endure if it were a conventional superconductor.

  • Nanostructures enable record high-harmonic generation
    on July 21, 2021 at 4:07 pm

    Researchers have developed nanostructures that enable record-breaking conversion of laser pulses into high-harmonic generation, paving the way for new scientific tools for high-resolution imaging.

  • Using ultra-low temperatures to understand high-temperature superconductivity
    on July 21, 2021 at 2:22 pm

    A so-called ‘strange metal’, well-known for its unusual properties, has been shown to be a superconductor at very low temperatures. This allows scientists to study the connection between ‘strange metal’-behavior and superconductivity, which could be an important step towards understanding the phenomenon of high-temperature superconductivity.

  • Ultrathin magnet operates at room temperature
    on July 20, 2021 at 3:43 pm

    Scientists have created an ultrathin magnet that operates at room temperature. The ultrathin magnet could lead to new applications in computing and electronics — such as high-density, compact spintronic memory devices — and new tools for the study of quantum physics.

  • Earth’s magnetosphere: The origin of bifurcated current sheets explained
    on July 20, 2021 at 3:43 pm

    A research team has identified the origin of bifurcated current sheets, considered one of the most unsolved mysteries in the Earth’s magnetosphere and in magnetized plasma physics.

  • Capturing electrons in space
    on July 20, 2021 at 3:42 pm

    Linear molecules can capture and bind free electrons through the permanent dipole moment interaction. Physicists have achieved laboratory confirmation of the existence of dipole-bound states. Such states can form an intermediate step in the creation of negatively charged molecules and explain the existence of negative ions in interstellar clouds in space.

  • Projecting bond properties with machine learning
    on July 19, 2021 at 2:30 pm

    Researchers have developed a machine learning-based model to predict the characteristics of bonded systems. Using the density of states of the individual component reactants, they have achieved accurate predictions of the binding energy, bond length, number of covalent electrons, and Fermi energy. The broadly applicable model is expected to make a significant contribution to the development of materials such as catalysts and nanowires.

  • The paradox of a free-electron laser without the laser
    on July 16, 2021 at 3:24 pm

    A new way of producing coherent light in the ultra-violet spectral region, which points the way to developing brilliant table-top x-ray sources.

  • Future information technologies: Topological materials for ultrafast spintronics
    on July 16, 2021 at 3:24 pm

    Using time- and spin-resolved methods at BESSY II, the physicists explored how, after optical excitation, the complex interplay in the behavior of excited electrons in the bulk and on the surface results in unusual spin dynamics. The work is an important step on the way to spintronic devices based on topological materials for ultrafast information processing.

  • Unconventional superconductor acts the part of a promising quantum computing platform
    on July 15, 2021 at 11:36 pm

    Scientists on the hunt for an unconventional kind of superconductor have produced the most compelling evidence to date that they’ve found one. Researchers have shown that uranium ditelluride displays many of the hallmarks of a topological superconductor — a material that may unlock new ways to build quantum computers and other futuristic devices.

  • Researchers discover a new inorganic material with lowest thermal conductivity ever reported
    on July 15, 2021 at 6:23 pm

    A collaborative research team has discovered a new inorganic material with the lowest thermal conductivity ever reported. This discovery paves the way for the development of new thermoelectric materials that will be critical for a sustainable society.

  • Scientists take snapshots of ultrafast switching in a quantum electronic device
    on July 15, 2021 at 6:23 pm

    Scientist demonstrated a new way of observing atoms as they move in a tiny quantum electronic switch as it operates. Along the way, they discovered a new material state that could pave the way for faster, more energy-efficient computing.

  • Quantum movements of small glass sphere controlled
    on July 14, 2021 at 5:19 pm

    The quantum movements of a small glass sphere could be controlled for the first time in Vienna by combining microscopy with control engineering, setting the course for future quantum technologies.

  • Scientists find way to navigate a heavy uphill climb
    on July 14, 2021 at 5:19 pm

    A team of scientists has uncovered how heavy, motorized objects climb steep slopes — a newly discovered mechanism that also mimics how rock climbers navigate inclines.

  • Small molecule plays outsize role in controlling nanoparticle
    on July 14, 2021 at 5:18 pm

    A breakthrough imaging technique has enabled researchers to gain new insights into how tiny ligands bind to the surface of nanoparticles and change a particle’s shape.

  • New mechanism of superconductivity discovered in graphene
    on July 14, 2021 at 3:06 pm

    New mechanism of superconductivity discovered in graphene. Placing a 2D Bose-Einstein condensate in the vicinity of a graphene layer confers superconductivity to the material.

  • New evidence of an anomalous phase of matter brings energy-efficient technologies closer
    on July 14, 2021 at 3:05 pm

    Researchers have found evidence for an anomalous phase of matter that was predicted to exist in the 1960s. Harnessing its properties could pave the way to new technologies able to share information without energy losses.

  • Opening the gate to the next generation of information processing
    on July 14, 2021 at 3:05 pm

    Scientists have devised a means of achieving improved information processing with a new technology for effective gate operation. This technology has applications in classical electronics as well as quantum computing, communications and sensing.

  • Quantum physics helps destroy cancer cells
    on July 14, 2021 at 3:04 pm

    Cancer cell death is triggered within three days when X-rays are shone onto tumor tissue containing iodine-carrying nanoparticles. The iodine releases electrons that break the tumor’s DNA, leading to cell death.

  • 5D imaging of ultrafast phenomena
    on July 13, 2021 at 6:58 pm

    An international team of researchers recently developed and experimentally demonstrated a spectral-volumetric (SV) CUP system that can simultaneously capture 5D information with a single snapshot measurement.

  • Electrons in quantum liquid gain energy from laser pulses
    on July 13, 2021 at 3:08 pm

    The absorption of energy from laser light by free electrons in a liquid has been demonstrated for the first time. Until now, this process was observed only in the gas phase. The findings open new doors for ultra-fast electron microscopy.

  • Optical singularities could be used for wide range of applications from super resolution imaging to optical trapping
    on July 12, 2021 at 10:33 pm

    Researchers have developed a new way to control and shape optical singularities. The technique can be used to engineer singularities of many shapes, far beyond simple curved or straight lines. It could be used for a wide range of applications from super resolution imaging to optical trapping.

  • Neutron-clustering effect in nuclear reactors demonstrated
    on July 12, 2021 at 10:33 pm

    The long-theorized neutron-clustering effect in nuclear reactors has been demonstrated, which could improve reactor safety and create more accurate simulations, according to a new study.

  • Discovery of 10 faces of plasma leads to new insights in fusion and plasma science
    on July 12, 2021 at 10:33 pm

    Scientists uncover new properties of plasma that have wide potential applications for astrophysical and fusion plasmas.

  • Scientists observe a new type of topological defect in chiral magnets
    on July 10, 2021 at 1:11 pm

    Scientists used Lorentz transmission electron microscopy (LTEM) to visualize topological defects. They were able to do so by passing electrons and observing their deflections through a thin magnetic film. The topological defects were observed as contrasting pairs of bright and dark areas. Using this technique, the team imaged topological defects in a chiral magnetic thin film made of cobalt, zinc, and manganese.

  • Seeing with radio waves
    on July 9, 2021 at 2:42 pm

    Researchers have achieved micrometer spatial resolution for radio-frequency imaging of nitrogen-vacancy centers in diamond by enhancing the signal with quantum spin-locking. This work may lead to more accurate material characterization, medical diagnostics, and quantum computers.

  • New theoretical model of high-temp superconductivity: Electrical current flowing with zero resistance
    on July 9, 2021 at 2:42 pm

    A researcher has introduced a new theory for superconductivity that can better explain the results of recent experiments with high-temperature superconductors. By focusing on the ‘Berry connection,’ this work may lead to energy distribution with much less electrical resistance.

  • Physicists take big step in race to quantum computing
    on July 9, 2021 at 2:41 pm

    A team of physicists has developed a special type of quantum computer known as a programmable quantum simulator capable of operating with 256 quantum bits, or ‘qubits.’

  • Unlocking radiation-free quantum technology with graphene
    on July 8, 2021 at 2:36 pm

    ‘Heavy fermions’ are an appealing theoretical way to produce quantum entangled phenomena, but until recently have been observed mostly in dangerously radioactive compounds. Researchers have now shown it is possible to make heavy fermions in subtly modified graphene, which is much cheaper and safer.

  • Quantum particles: Pulled and compressed
    on July 7, 2021 at 8:05 pm

    Only recently researchers have levitated and cooled nanoparticles into the quantum regime. A research team now proposes a way to harness the quantum properties of such particles before they lose them due to decoherence. To this end, the wave function of the particle is repeatedly expanded and compressed.

  • Scientists use artificial intelligence to detect gravitational waves
    on July 7, 2021 at 8:04 pm

    Researchers have used artificial intelligence to dramatically reduce the time it takes to process data coming from the Laser Interferometer Gravitational-Wave Observatory.

  • Scientists home in on recipe for entirely renewable energy
    on July 7, 2021 at 3:25 pm

    Scientists are homing in on a recipe that would enable the future production of entirely renewable, clean energy from which water would be the only waste product. Using their expertise in chemistry, theoretical physics and artificial intelligence, the team is now fine-tuning the recipe with the genuine belief that the seemingly impossible will one day be reality.

  • Cutting through noise for better solar cells
    on July 7, 2021 at 3:25 pm

    Physicists used cross-correlation noise spectroscopy to measure miniscule fluctuations in electrical current flowing between materials inside silicon solar cells. The researchers identified crucial electrical noise signals that are completely invisible to conventional noise-measuring methods. They were also able to pinpoint the likely physical processes causing the noise, which often results in a loss of energy and lower efficiency. The technique is an important new tool to improve material interfaces for a better solar cell.

  • Quantum laser turns energy loss into gain?
    on July 7, 2021 at 3:24 pm

    Scientists have fabricated a laser system that generates highly interactive quantum particles at room temperature. Their findings could lead to a single microcavity laser system that requires lower threshold energy as its energy loss increases.

  • Igniting plasmas in liquids
    on July 7, 2021 at 3:24 pm

    Physicists have taken spectacular pictures that allow the ignition process of plasma under water to be viewed and tracked in real time. They have provided the first data sets with ultra-high temporal resolution, supporting a new hypothesis on the ignition of these plasmas: In the nanosecond range, there is not enough time to form a gas environment. Electrons generated by field effects lead to the propagation of the plasma.

  • New clues to why there’s so little antimatter in the universe
    on July 7, 2021 at 3:23 pm

    New research shows radioactive molecules are sensitive to subtle nuclear phenomena. The molecules might help physicists probe violation of the most fundamental symmetries of nature, including why the universe contains relatively little antimatter.

  • Ultrathin semiconductors electrically connected to superconductors
    on July 6, 2021 at 7:30 pm

    Researchers have equipped an ultrathin semiconductor with superconducting contacts. These extremely thin materials with novel electronic and optical properties could pave the way for previously unimagined applications. Combined with superconductors, they are expected to give rise to new quantum phenomena and find use in quantum technology.

  • New nanotech will enable a ‘healthy’ electric current production inside the human body, researchers report
    on July 6, 2021 at 5:31 pm

    Researchers have developed an innovative material that is eco-friendly, completely biological and non-toxic, and causes no harm to the body’s tissues. The material is as strong as titanium and extremely flexible. The new development will allow for the charging of pacemakers using only the heartbeat, eliminating the need for batteries. The new material will make it possible to produce green energy activated by mechanical force that can be applied to other areas as well.

  • Developing new techniques to build biomaterials
    on July 6, 2021 at 5:28 pm

    Scientists have developed an approach that could help in the design of a new generation of synthetic biomaterials made from proteins. The biomaterials could eventually have applications in joint repair or wound healing as well as other fields of healthcare and food production.