Physics

Physics News -- ScienceDaily Physics News and Research. Why is the universe more partial to matter than antimatter? How could fuel cells be more efficient? Read current science articles on physics.

  • Atomic imperfections move quantum communication network closer to reality
    on June 23, 2017 at 7:55 pm

    An international team of scientists has discovered how to manipulate a weird quantum interface between light and matter in silicon carbide along wavelengths used in telecommunications. […]

  • Single electron's tiny leap sets off 'molecular sunscreen' response
    on June 22, 2017 at 7:54 pm

    Scientists have seen the first step of a process that protects a DNA building block called thymine from sun damage: When it's hit with ultraviolet light, a single electron jumps into a slightly higher orbit around the nucleus of a single oxygen atom. […]

  • Quantum thermometer or optical refrigerator?
    on June 22, 2017 at 6:30 pm

    In an arranged marriage of optics and mechanics, physicists have created microscopic structural beams that have a variety of powerful uses when light strikes them. […]

  • How protons move through a fuel cell
    on June 22, 2017 at 2:39 pm

    Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Researchers have now succeeded in decoding the movement of hydrogen ions in crystals -- a key step towards more efficient energy conversion in the hydrogen industry of tomorrow. […]

  • Holey pattern boosts coherence of nanomechanical membrane vibrations
    on June 22, 2017 at 2:38 pm

    Researchers have introduced a new type of nanomechanical resonator, in which a pattern of holes localizes vibrations to a small region in a 30 nm thick membrane. The pattern dramatically suppresses coupling to random fluctuations in the environment, boosting the vibrations' coherence. The researchers' quantitative understanding and numerical models provide a versatile blueprint for ultracoherent nanomechanical devices. Among others, this enables a new generation of nanomechanical sensors to probe quantum limits of mechanical measurements, and more sensitive force microscopy. […]

  • Deceleration of runaway electrons paves the way for fusion power
    on June 21, 2017 at 12:24 pm

    Fusion power has the potential to provide clean and safe energy that is free from carbon dioxide emissions. However, imitating the solar energy process is a difficult task to achieve. Two young plasma physicists have now taken us one step closer to a functional fusion reactor. Their model could lead to better methods for decelerating the runaway electrons, which could destroy a future reactor without warning. […]

  • Illuminating a better way to calculate excitation energy
    on June 20, 2017 at 3:42 pm

    Researchers have demonstrated a new method to calculate excitation energies. They used a new approach based on density functional methods, which use an atom-by-atom approach to calculate electronic interactions. By analyzing a benchmark set of small molecules and oligomers, their functional produced more accurate estimates of excitation energy compared to other commonly used density functionals, while requiring less computing power. […]

  • New metrology technique measures electric fields
    on June 20, 2017 at 3:42 pm

    It is crucial that mobile phones and other wireless devices -- so prevalent today -- have accurate and traceable measurements for electric fields and radiated power. Until recently, however, it wasn't possible to build self-calibrating probes that could generate independent and absolute measurements of these. To address this, researchers have developed a method to measure electric fields and a probe to carry out such measurements. […]

  • Using photoluminescent nanorods as ultimate probes of fluid flow
    on June 20, 2017 at 1:34 pm

    A new method has been created for very precise determination of fluid flow in capillary networks in realtime, report scientists in a new report. […]

  • Electron caught in the act
    on June 20, 2017 at 1:32 pm

    Australia's fastest camera has revealed the time it takes for molecules to break apart. The experimental research aims to help in the design of new molecules for materials science or drug discovery. […]

  • Tiny bubbles provide tremendous propulsion in new microparticles research
    on June 20, 2017 at 1:31 pm

    A new technique could have significant implications in the development of micromotors and optical devices for use in solar cell optics, report researchers. […]

  • To connect biology with electronics, be rigid, yet flexible
    on June 19, 2017 at 4:09 pm

    Scientists have measured a thin film made of a single type of conjugated polymer — a conducting plastic — as it interacted with ions and electrons. They show how there are rigid and non-rigid regions of the film, and that these regions could accommodate electrons or ions — but not both equally. […]

  • Sound waves direct particles to self-assemble, self-heal
    on June 19, 2017 at 4:04 pm

    Scientists have demonstrated how floating particles will assemble and synchronize in response to acoustic waves. Their simple experiment provides a new framework for studying how seemingly lifelike behaviors emerge in response to external forces. The work could help address fundamental questions about energy dissipation and non-equilibrium thermodynamics. […]

  • New approach improves ability to predict metals' reactions with water
    on June 17, 2017 at 11:36 am

    The wide reach of corrosion, a multitrillion-dollar global problem, may someday be narrowed considerably thanks to a new, better approach to predict how metals react with water. […]

  • Making wires of polymers chains
    on June 16, 2017 at 4:17 pm

    Researchers have modeled a new route to molecular wires suitable for use in miniature electronics. […]

  • Shaking Schrödinger's cat
    on June 16, 2017 at 12:34 pm

    Frequent measurement of a quantum system's state can either speed or delay its collapse, effects called the quantum Zeno and quantum anti-Zeno effect. But so too can "quasimeasurements" that only poke the system and garner no information about its state. […]

  • Interplay of light and matter: A 'perfect' attosecond experiment
    on June 15, 2017 at 7:50 pm

    Novel experiments using ultrafast pulses are currently revolutionizing laser physics research. They deliver unprecedented insights into matter – into the structure and dynamics of electrons in atoms, molecules and in condensed phases. Using what is known as an attosecond experiment, physicists have managed to completely measure and describe the quantum-mechanical wave function of an ionized electron. […]

  • Ring, Ring: 'Earth? It's space calling, on the quantum line'
    on June 15, 2017 at 6:27 pm

    Scientists report the successful transmission of entangled photons between suborbital space and Earth. […]

  • Smart materials used in ultrasound behave similar to water
    on June 15, 2017 at 4:06 pm

    Researchers have provided new insight into piezoelectrics materials, a smart material used in ultrasound technology. While forming the most thorough model to date of how these materials work, they found striking similarities with the behavior of water. A more complete understanding of why these materials behave the way they do can unlock new materials design, leading to higher quality piezoelectrics that may revolutionize smart material applications. […]

  • Development of low-dimensional nanomaterials could revolutionize future technologies
    on June 15, 2017 at 4:06 pm

    Some scientists believe improvements in computer processors, TV displays and solar cells will come from scientific advancements in the synthesis of low-dimensional nanomaterials. […]

  • Shortcut to satellite-based quantum encryption network
    on June 15, 2017 at 4:05 pm

    Researchers demonstrate ground-based measurements of quantum states sent by a laser aboard a satellite 38,000 kilometers above Earth. […]

  • New chemical method could revolutionize graphene
    on June 15, 2017 at 1:12 am

    Scientists have discovered a new chemical method that enables graphene to be incorporated into a wide range of applications while maintaining its ultra-fast electronics. […]

  • Missing piece to high-temperature superconductor mystery
    on June 14, 2017 at 6:28 pm

    New features identified in the electronic behavior of a copper oxide material that may help explain why it becomes a perfect electrical conductor -- a superconductor -- at relatively high temperatures. […]

  • Superconducting nanowire memory cell, miniaturized technology
    on June 13, 2017 at 8:33 pm

    Researchers have developed a new nanoscale memory cell that holds tremendous promise for successful integration with superconducting processors. The new technology provides stable memory at a smaller size than other proposed memory devices. […]

  • Shining light on low-energy electrons
    on June 13, 2017 at 3:17 pm

    The classic method for studying how electrons interact with matter is by analyzing their scattering through thin layers of a known substance. This happens by directing a stream of electrons at the layer and analyzing the subsequent deviations in the electrons' trajectories. Researchers have now devised a way to examine the movement of low-energy electrons that can adversely impact electronic systems and biological tissue. […]

  • Surprise just beneath the surface in carbon dioxide experiment
    on June 12, 2017 at 7:35 pm

    When a carbon dioxide experiment didn't match with what theorists predicted, researchers went back to the drawing board and discovered something new. […]

  • Chemists perform surgery on nanoparticles
    on June 12, 2017 at 7:35 pm

    A team of chemists has for the first time conducted site-specific surgery on a nanoparticle. The procedure, which allows for the precise tailoring of nanoparticles, stands to advance the field of nanochemistry by allowing researchers to enhance nanoparticles' functional properties, such as catalytic activity and photoluminescence, increasing their usefulness in a wide variety of fields including health care, electronics and manufacturing. […]

  • New computing system takes its cues from human brain
    on June 12, 2017 at 3:53 pm

    Researchers have created a new computing system that aims to tackle one of computing's hardest problems in a fraction of the time. […]

  • Quantum theory for manipulating nanomagnets
    on June 12, 2017 at 1:42 pm

    A new theory that predicts the properties of nanomagnets manipulated with electric currents has now been revealed by experts. This theory is useful for future quantum technologies. […]

  • Zig-zagging device focuses high-energy radiation emissions
    on June 12, 2017 at 1:41 pm

    Equipment used in cancer treatment requires a strong, monochromatic source of radiation to produce hard X-rays. Other similar radiation sources find applications in nuclear waste processing. To design devices that steadily emit a specific type of radiation, physicists use a special kind of crystal, referred to as a crystalline undulator. Scientists have now demonstrated the ability to control radiation emissions from a particle traveling through such a device. […]