ScienceDaily Physics News Feeds

  • Fourth signature of the superconducting transition in cuprates
    on January 26, 2022 at 5:24 pm

    Superconductors have four classic traits, including conducting electric current without loss and levitating magnets. Now the discovery of the fourth and final trait caps 15 years of detective work.

  • Quantum computing: Vibrating atoms make robust qubits, physicists find
    on January 26, 2022 at 5:24 pm

    Physicists have discovered a new quantum bit, or ‘qubit,’ in the form of vibrating pairs of atoms known as fermions. The new qubit appears to be extremely robust, able to maintain superposition between two vibrational states, even in the midst of environmental noise, for up to 10 seconds, offering a possible foundation for future quantum computers.

  • Atomic Armor for accelerators enables discoveries
    on January 25, 2022 at 8:10 pm

    Protective coatings are common for many things in daily life that see a lot of use: we coat wood floors with finish; apply Teflon to the paint on cars; even use diamond coatings on medical devices. Protective coatings are also essential in many demanding research and industrial applications.

  • Physicist solves century old problem of radiation reaction
    on January 25, 2022 at 5:40 pm

    A physicist has proposed a radical solution to the question of how a charged particle, such as an electron, responded to its own electromagnetic field. This question has challenged physicists for over 100 years but a mathematical physicist has suggested an alternative approach, with controversial implications.

  • Studying the Big Bang with artificial intelligence
    on January 25, 2022 at 2:30 pm

    Artificial intelligence is being used for many extremely complex tasks. So why not use machine learning to study particle physics? As it turns out, this is not easy, because of some special mathematical properties of particle physics. But now, a neural network has been developed that can be used to study quark gluon plasma – the state of the universe after the Big Bang.

  • Scientists make first detection of exotic ‘X’ particles in quark-gluon plasma
    on January 24, 2022 at 4:50 pm

    Physicists have found evidence of X particles in the quark-gluon plasma produced in the Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research, based near Geneva, Switzerland.

  • Quantum dots boost perovskite solar cell efficiency and scalability
    on January 20, 2022 at 7:07 pm

    Scientists have boosted the efficiency and scalability of perovskite solar cells by replacing their electron-transport layers with a thin layer of quantum dots.

  • Advancing materials science with the help of biology and a dash of dish soap
    on January 20, 2022 at 7:07 pm

    Scientists have finally found a way to probe delicate microcrystals with powerful X-ray laser beams. They say their method could help advance semiconductor and solar cell development.

  • Towards quantum simulation of false vacuum decay
    on January 20, 2022 at 5:53 pm

    By shaking an optical lattice potential, researchers have realized a discontinuous phase transition in a strongly correlated quantum gas, opening the door to quantum simulations of false vacuum decay in the early universe.

  • Stirring a superfluid with a laser
    on January 20, 2022 at 3:34 pm

    Researchers used optical trapping for the first time inside an ultracold superfluid made of helium. They were able to trap and monitor nanoparticles optically at ultralow temperatures. This technique may assist in future experiments in the field of quantum hydrodynamics.

  • Towards compact quantum computers thanks to topology
    on January 20, 2022 at 3:34 pm

    Researchers at PSI have compared the electron distribution below the oxide layer of two semiconductors. The investigation is part of an effort to develop particularly stable quantum bits — and thus, in turn, particularly efficient quantum computers.

  • Scientists achieve key elements for fault-tolerant quantum computation in silicon spin qubits
    on January 19, 2022 at 5:15 pm

    Researchers have achieved a key milestone toward the development of a fault-tolerant quantum computer. They were able to demonstrate a two-qubit gate fidelity of 99.5 percent — higher than the 99 percent considered to be the threshold for building fault-tolerant computers — using electron spin qubits in silicon, which are promising for large-scale quantum computers as the nanofabrication technology for building them already exists.

  • Quantum computing in silicon hits 99 percent accuracy
    on January 19, 2022 at 5:15 pm

    Researchers have proven that near error-free quantum computing is possible, paving the way to build silicon-based quantum devices compatible with current semiconductor manufacturing technology.

  • Inner workings of quantum computers
    on January 19, 2022 at 5:14 pm

    A precision diagnostic is emerging as a gold standard for detecting and describing problems inside quantum computing hardware.

  • Solving a crystal’s structure when you’ve only got powder
    on January 19, 2022 at 5:14 pm

    Crystals reveal the hidden geometry of molecules to the naked eye. Scientists use crystals to figure out the atomic structure of new materials, but many materials can’t be grown large enough. Now, a team of researchers report a new technique that can lead to the discovery of the crystalline structure of any substance.

  • On the tiniest of scales, chemistry isn’t all about ‘billiard-ball’ reactions
    on January 18, 2022 at 8:48 pm

    In a recent study, scientists provide evidence of the effects of photodissociation on the quantum level for an atmospheric pollutant, formaldehyde, thereby showing photodissociation reactions can’t be treated classically, like ‘billiard-balls’ coming together, colliding and reconnecting, said an author of a new study.

  • Arase satellite uncovers coupling between plasma waves and charged particles in Geospace
    on January 14, 2022 at 4:56 pm

    Researchers show that high-frequency plasma waves in the Geospace can generate low-frequency plasma waves through wave-particle interactions by heating up low-energy ions, unveiling a new energy transfer pathway in collisionless plasma.

  • New study shows novel crystal structure for hydrogen under high pressure
    on January 14, 2022 at 4:56 pm

    Being the first element to form, hydrogen holds clues about the distribution of matter in our universe. Normally a gas, hydrogen exists as a solid under ultra-high-pressure conditions commonly found in the core of giant gaseous planets. However, the structures of solid hydrogen have remained elusive owing to difficulties in replicating such conditions experimentally. Now, a new study sheds light on this aspect using simulations and data science methods.

  • Nanostructures get complex with electron equivalents
    on January 14, 2022 at 12:41 am

    Complex crystals that mimic metals — including a structure for which there is no natural equivalent — can be achieved with a new approach to guiding nanoparticle self-assembly.

  • Tuning the bonds of paired quantum particles to create dissipationless flow
    on January 13, 2022 at 8:13 pm

    An adjustable platform made from atomically thin materials may help researchers figure out how to create a robust quantum condensate that can flow without dissipation.

  • Newly discovered type of ‘strange metal’ could lead to deep insights
    on January 12, 2022 at 5:14 pm

    A new discovery could help scientists to understand ‘strange metals,’ a class of materials that are related to high-temperature superconductors and share fundamental quantum attributes with black holes.

  • Photon pairs are more sensitive to rotations than single photons
    on January 12, 2022 at 3:56 pm

    Quantum states of light have enabled novel optical sensing schemes, e.g., for measuring distance or position, with precisions impossible to achieve with classical light sources such as lasers. The field of quantum metrology has now been pushed even further as a team of researchers showed that photons that are engineered to be entangled in complex spatial structures have, due to quantum phenomena, an advantage for sensing the smallest rotations. The new method allows for more precise measurement than what could be achieved by conventional means.

  • Molecular paddlewheels propel sodium ions through next-generation batteries
    on January 12, 2022 at 12:30 am

    Materials scientists have revealed paddlewheel-like molecular dynamics that help push sodium ions through a quickly evolving class of solid-state batteries. The insights should guide researchers in their pursuit of a new generation of sodium-ion batteries to replace lithium-ion technology in a wide range of applications such as data centers and home energy storage.

  • Common household cleaner can boost effort to harvest fusion energy on Earth
    on January 12, 2022 at 12:30 am

    Path-setting findings demonstrate for the first time a novel regime for confining heat in stellarators. The demonstration could advance the twisty design as a blueprint for future fusion power plants.

  • Terahertz radiation source: Compact and simple
    on January 11, 2022 at 4:20 pm

    Researchers have now succeeded in producing an extremely simple and compact source of terahertz radiation: An oscillator with double resonant-tunneling diodes. Its radiation power significantly outperforms similar devices.

  • Ions in the machine: How simple liquids like water can perform complex calculations
    on January 11, 2022 at 3:00 pm

    To demonstrate the potential of chemical dynamics as a computing resource, researchers developed a method for building physical reservoirs based on the electrochemical reactions of solutions placed on electrodes. Polyoxometalate in solution was found to predict periodic signals well. In contrast, distilled water was suitable for solving a second-order nonlinear problem. These findings demonstrate the potential for electrochemical ion reactions in low-cost and energy efficient reservoir computing systems.

  • Physicists detect a hybrid particle held together by uniquely intense ‘glue’
    on January 10, 2022 at 11:49 pm

    Physicists detected a hybrid particle that is a mashup of an electron and a phonon, ‘glued’ together with an exceptionally strong bond. It may be possible to tune the two components in tandem, enabling scientists to apply voltage or light to a material to tune not just its electrical properties but also its magnetism.

  • Migrating holes help catalysts be productive
    on January 10, 2022 at 11:48 pm

    A theoretical model suggests electron holes that propagate at active sites on a catalyst migrate, triggering other sites that continue the process.

  • Light–matter interactions simulated on the world’s fastest supercomputer
    on January 7, 2022 at 3:10 pm

    Researchers have developed a computational approach for simulating interactions between matter and light at the atomic scale. The team tested their method by modeling light — matter interactions in a thin film of amorphous silicon dioxide, composed of more than 10,000 atoms, using the world’s fastest supercomputer, Fugaku. The proposed approach is highly efficient and could be used to study a wide range of phenomena in nanoscale optics and photonics.

  • Integrated photonics for quantum technologies
    on January 7, 2022 at 3:10 pm

    An international team of leading scientists has compiled a comprehensive overview of the potential, global outlook, background and frontiers of integrated photonics. The paper is a roadmap for integrated photonic circuits for quantum technologies. The review outlines underlying technologies, presents the current state of play of research and describes possible future applications.

  • Magnetic surprise revealed in ‘magic-angle’ graphene
    on January 6, 2022 at 8:24 pm

    Magnets and superconductors don’t normally get along, but a new study shows that ‘magic-angle’ graphene is capable of producing both superconductivity and ferromagnetism, which could be useful in quantum computing.

  • Mass production of revolutionary computer memory moves closer with ULTRARAM™ on silicon wafers for the first time
    on January 6, 2022 at 7:32 pm

    A pioneering type of patented computer memory known as ULTRARAM™ has been demonstrated on silicon wafers in what is a major step towards its large-scale manufacture. ULTRARAM™ is novel type of memory with extraordinary properties. It combines the non-volatility of a data storage memory, like flash, with the speed, energy-efficiency and endurance of a working memory, like DRAM. To do this it utilizes the unique properties of compound semiconductors, commonly used in photonic devices such as LEDS, laser diodes and infrared detectors, but not in digital electronics, which is the preserve of silicon.

  • Nematicity is a new piece in a phase diagram puzzle
    on January 6, 2022 at 6:33 pm

    A team sees stripes in samples of twisted double bilayer graphene, indicating the presence of a nematic phase characterized by broken rotational symmetry.

  • Physicists watch as ultracold atoms form a crystal of quantum tornadoes
    on January 5, 2022 at 10:41 pm

    Physicists have directly observed ultracold atoms forming ‘quantum tornadoes’ in a spinning fluid of ultracold atoms. The observations record a key crossover from classical to quantum behavior.

  • Matter and antimatter seem to respond equally to gravity
    on January 5, 2022 at 4:14 pm

    As part of an experiment to measure — to an extremely precise degree — the charge-to-mass ratios of protons and antiprotons, researchers have found that, within the uncertainty of the experiment, matter and antimatter respond to gravity in the same way.

  • The first topological acoustic transistor
    on January 5, 2022 at 4:13 pm

    Researchers have designed and simulated the first topological acoustic transistors — with sound waves instead of electrons — and proposed a connection architecture to form a universal logic gate that can switch the flow of sound on and off.

  • Suppressing the Auger recombination process in quantum dots
    on January 5, 2022 at 2:45 pm

    Quantum Dot (QD) is a nanometer-sized semiconductor nanocrystal that has unique optical properties such as the ability to emit light in the range of optical frequencies depending on its size. QDs have already been applied to practical optoelectronic applications including light-emitting displays, solar cells, photodetectors, and lasers.

  • Resolving the black hole ‘fuzzball or wormhole’ debate
    on January 4, 2022 at 4:22 pm

    Black holes really are giant fuzzballs, a new study says. The study attempts to put to rest the debate over Stephen Hawking’s famous information paradox, the problem created by Hawking’s conclusion that any data that enters a black hole can never leave. This conclusion accorded with the laws of thermodynamics, but opposed the fundamental laws of quantum mechanics.

  • Snapshots from the quantum world
    on January 3, 2022 at 5:17 pm

    A research collaboration can read out optically previously indistinguishable spin states by using a newly developed spectroscopy method.

  • 3D semiconductor particles offer 2D properties
    on January 3, 2022 at 5:17 pm

    Researchers have discovered that the junctures at the facet edges of 3D semiconductor particles have 2D properties, which can be leveraged for photoelectrochemical processes — in which light is used to drive chemical reactions — that can boost solar energy conversion technologies.

  • Self-healing nanomaterials usable in solar panels and other electronic devices
    on January 3, 2022 at 3:46 pm

    The field of self-repairing materials is rapidly expanding, and what used to be science fiction might soon become reality, thanks to scientists who developed eco-friendly nanocrystal semiconductors capable of self-healing. Their findings describe the process, in which a group of materials called double perovskites display self-healing properties after being damaged by the radiation of an electron beam.

  • Record-setting isotope of magnesium
    on December 23, 2021 at 9:10 pm

    Researchers have created an extraordinarily light version, or isotope, of magnesium.

  • Novel semiconductor gives new perspective on anomalous Hall effect
    on December 22, 2021 at 8:31 pm

    A large, unconventional anomalous Hall resistance in a new magnetic semiconductor in the absence of large-scale magnetic ordering has been demonstrated, validating a recent theoretical prediction. Their findings provide new insights into the anomalous Hall effect, a quantum phenomenon that has previously been associated with long-range magnetic order.

  • A-list candidate for fault-free quantum computing delivers surprise
    on December 22, 2021 at 8:31 pm

    Superconducting uranium ditelluride is a promising material in the race to create fault-tolerant quantum computers, but physicists are rethinking how superconductivity arises in the material in light of puzzling new experimental evidence.

  • Scientists demonstrate a novel rocket for deep-space exploration
    on December 22, 2021 at 8:30 pm

    The growing interest in deep-space exploration has sparked the need for powerful long-lived rocket systems to drive spacecraft through the cosmos. Scientists have developed a tiny version of a Hall thruster propulsion system that increases the lifetime of the rocket and produces high power.

  • Fabrication of flexible electronics improved using gold and water-vapor plasma
    on December 22, 2021 at 8:30 pm

    Researchers have developed a technique to improve the flexibility of ultra-thin electronics, such as those used in bendable devices or clothing. To do so, they used water-vapor plasma to directly bond gold electrodes fixed onto separate ultra-thin polymer films. This is a significance advance because the technique works without adhesives or high temperatures.

  • Semiconductors reach the quantum world
    on December 22, 2021 at 8:29 pm

    Quantum effects in superconductors could give semiconductor technology a new twist. Researchers have identified a composite material that could integrate quantum devices into semiconductor technology, making electronic components significantly more powerful.

  • Machine learning used to predict synthesis of complex novel materials
    on December 22, 2021 at 8:12 pm

    Researchers have successfully applied machine learning to guide the synthesis of new nanomaterials, eliminating barriers associated with materials discovery. The highly trained algorithm combed through a defined dataset to accurately predict new structures that could fuel processes in clean energy, chemical and automotive industries.

  • Quantum marbles in a bowl of light
    on December 22, 2021 at 8:11 pm

    Which factors determine how fast a quantum computer can perform its calculations? Physicists have devised an elegant experiment to answer this question.

  • Machine learning models quantum devices
    on December 22, 2021 at 1:40 pm

    Technologies that take advantage of novel quantum mechanical behaviors are likely to become commonplace in the near future. These may include devices that use quantum information as input and output data, which require careful verification due to inherent uncertainties. The verification is more challenging if the device is time dependent when the output depends on past inputs. For the first time, researchers using machine learning dramatically improved the efficiency of verification for time-dependent quantum devices by incorporating a certain memory effect present in these systems.

  • Sensor based on quantum physics could detect SARS-CoV-2 virus
    on December 21, 2021 at 6:34 pm

    Researchers found it’s possible to design a sensor, based on quantum physics, that could detect the SARS-CoV-2 virus. The approach may offer faster, cheaper, and more accurate detection of Covid-19, including of new variants.

  • Swinging on the quantum level
    on December 21, 2021 at 3:27 pm

    For many applications making use of quantum effects, the light has to be in a certain state — namely a single photon state. But what is the best way of generating such single photon states? Researchers have now proposed an entirely new way.

  • Speeding the development of fusion energy
    on December 21, 2021 at 12:06 am

    Profile of path-setting method to simulate the crazy-quilt movement of free electrons during experimental efforts to harness on Earth the fusion power that drives the sun and stars. The method cracks a complex equation that can enable improved control of the random and fast-moving moving electrons in the fuel for fusion energy.

  • 3D printed nanomagnets unveil a world of patterns in the magnetic field
    on December 20, 2021 at 5:06 pm

    Researchers have created DNA-like magnetic nanostructures that form strong inter-helix magnetic bonds. These produce topological textures in the magnetic field, opening the door to the next generation of magnetic devices, and patterning magnetic fields on the nanoscale.

  • Measuring a quantum computer’s power just got faster and more accurate
    on December 20, 2021 at 5:06 pm

    What does a quantum computer have in common with a top draft pick in sports? Both have attracted lots of attention from talent scouts. Quantum computers, experimental machines that can perform some tasks faster than supercomputers, are constantly evaluated, much like young athletes, for their potential to someday become game-changing technology.

  • Moments of silence point the way towards better superconductors
    on December 20, 2021 at 5:06 pm

    High-precision measurements have provided important clues about processes that impair the efficiency of superconductors. Future work building on this research could offer improvements in a range of superconductor devices, such quantum computers and sensitive particle detectors.

  • Magnetic ‘hedgehogs’ could store big data in a small space
    on December 17, 2021 at 4:32 pm

    Atomic-scale magnetic patterns resembling a hedgehog’s spikes could result in hard disks with massively larger capacities than today’s devices, a new study suggests. The finding could help data centers keep up with the exponentially increasing demand for video and cloud data storage.

  • Demonstrating Feshbach resonances between a single ion and ultracold atoms
    on December 16, 2021 at 7:59 pm

    A team has demonstrated magnetic Feshbach resonances between a single barium ion and lithium atoms at near absolute zero temperature. The researchers found that depending on the strength of the external magnetic field, the expansion of the ion and atoms can be controlled.

  • Nanodiamonds are key to efficient hydrogen purification
    on December 16, 2021 at 7:59 pm

    Researchers describe how nanodiamond-reinforced composite membranes can purify hydrogen from its humid mixtures, making the hydrogen generation processes vastly more efficient and cost-effective.

  • A quantum view of ‘combs’ of light
    on December 16, 2021 at 7:59 pm

    Frequency microcombs are specialized light sources that can function as light-based clocks, rulers and sensors to measure time, distance and molecular composition with high precision. New research presents a novel tool for investigating the quantum characteristics of these sources.