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.

  • The 'missing link' in conducting molecules, butadiene -- solved
    on April 24, 2018 at 3:29 pm

    Trans 1,3-butadiene, the smallest polyene, has challenged researchers over the past 40 years because of its complex excited-state electronic structure and its ultrafast dynamics. Butadiene remains the 'missing link' between ethylene, which has only one double bond, and longer linear polyenes with three or more double bonds. Now, an experimental team has solved trans 1,3-butadiene's electronic-structural dynamics. […]

  • Getting electrons to move in a semiconductor
    on April 24, 2018 at 3:29 pm

    Researchers have shown that a wide-bandgap semiconductor called gallium oxide can be engineered into nanometer-scale structures that allow electrons to move much faster within the crystal structure. With electrons that move with such ease, Ga2O3 could be a promising material for applications such as high-frequency communication systems and energy-efficient power electronics. […]

  • Playing quantum catch in new research
    on April 23, 2018 at 4:51 pm

    Researchers 'pitch' a qubit -- a tiny bit of quantum data -- from one physical point in a microwave cavity to a separate point in a different cavity. It is the first time an end-to-end quantum transmission has been done on demand. […]

  • Organic solar cells reach record efficiency, benchmark for commercialization
    on April 23, 2018 at 3:08 pm

    In an advance that makes a more flexible, inexpensive type of solar cell commercially viable, researchers have demonstrated organic solar cells that can achieve 15 percent efficiency. […]

  • Attosecond physics: Molecules brilliantly illuminated
    on April 23, 2018 at 3:07 pm

    A new high-power laser system generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. […]

  • Path to a new era of microelectronics
    on April 20, 2018 at 9:05 pm

    A new microchip technology capable of optically transferring data could solve a severe bottleneck in current devices by speeding data transfer and reducing energy consumption by orders of magnitude, according to a new article. […]

  • Graphene sets a new record on squeezing light to one atom
    on April 20, 2018 at 4:28 pm

    Researchers reach the ultimate level of light confinement -- the space of one atom. This will pave the way to ultra-small optical switches, detectors and sensors. […]

  • Atoms may hum a tune from grand cosmic symphony
    on April 19, 2018 at 6:15 pm

    Researchers playing with a cloud of ultracold atoms uncovered behavior that bears a striking resemblance to the universe in microcosm. Their work forges new connections between atomic physics and the sudden expansion of the early universe. […]

  • Electrochemical tuning of single layer materials relies on defects
    on April 19, 2018 at 5:10 pm

    Perfection is not everything, according to an international team of researchers whose 2-D materials study shows that defects can enhance a material's physical, electrochemical, magnetic, energy and catalytic properties. […]

  • Porous salts for fuel cells
    on April 19, 2018 at 5:10 pm

    Scientists have developed a new class of crystalline porous organic salts with high proton conductivity for applications such as proton-exchange membranes for fuel cells. […]

  • Energy conversion: Optical 'overtones' for solar cells
    on April 19, 2018 at 5:00 pm

    Scientists have found a new effect regarding the optical excitation of charge carriers in a solar semiconductor. It could facilitate the utilization of infrared light, which is normally lost in solar devices. […]

  • Diamond-like carbon is formed differently to what was believed -- machine learning enables...
    on April 19, 2018 at 2:02 pm

    Researchers have made a significant breakthrough in computational science by combining atomic-level modelling and machine learning. For the first time, the method has been used to realistically model how an amorphous material is formed at the atomic level: that is, a material that does not have a regular crystalline structure. The approach is expected to have impact on the research of many other materials. […]

  • Salt boosts creation of 2-D materials
    on April 19, 2018 at 2:01 pm

    Salt simplifies the process of making novel two-dimensional materials. Recent simulations by scientists show how labs were able to make dozens of 2-D compounds, including many novel materials. […]

  • En route to the optical nuclear clock
    on April 18, 2018 at 6:15 pm

    Researchers have performed the first-ever optical measurements of some important properties of the low-energy state of the Th-229 nucleus. In this way, a laser excitation of the atomic nucleus can be monitored, thus allowing an optical nuclear clock to be realized that 'ticks' more precisely than present-day atomic clocks. […]

  • Simulation of the AsqJ enzyme opens up new options for pharmaceutical chemistry
    on April 17, 2018 at 5:01 pm

    Practically all biochemical processes involve enzymes that accelerate chemical reactions. A research team has now for the first time deciphered the molecular mechanism of the enzyme AsqJ. Their findings might open up new options in the production of pharmaceutically active molecules. […]

  • Understanding Mercury's magnetic tail
    on April 17, 2018 at 3:57 pm

    Theoretical physicists used simulations to explain the unusual readings collected in 2009 by the Mercury Surface, Space Environment, Geochemistry, and Ranging mission. The origin of energetic electrons detected in Mercury's magnetic tail has puzzled scientists. This new study provides a possible solution to how these energetic electrons form. […]

  • Scientists make counter-intuitive observations in hybrid quantum systems
    on April 17, 2018 at 3:57 pm

    Scientist have found that the cooling of quantum systems coupled to a common reservoir can lead to counter-intuitive behavior, where one of the quantum systems actually heats up. […]

  • New type of 'opal' formed by common seaweed
    on April 17, 2018 at 3:57 pm

    Scientists have discovered a completely new type of opal formed by a common seaweed which harnesses natural technology by self-assembling a nanostructure of oil droplets to control how light reflects from its cells to display a shimmering array of colours that until now, has only been seen in the gem stone. […]

  • From insulator to conductor in a flash
    on April 16, 2018 at 10:56 pm

    A clever combination of novel technologies enables us to study promising materials for the electronics of tomorrow. Using short laser pulses, a research team have now shed light on the extremely rapid processes taking place within novel materials. […]

  • A new Bose-Einstein condensate
    on April 16, 2018 at 6:54 pm

    Researchers have created a Bose-Einstein condensate of light coupled with metal electrons, so-called surface plasmon polaritons. […]

  • Quantum shift shows itself in coupled light and matter
    on April 16, 2018 at 6:25 pm

    Researchers observe and measure a Bloch-Siegert shift in strongly coupled light and matter in a vacuum. The project could aid in the development of quantum computers. […]

  • When nuclei catch up with electrons
    on April 16, 2018 at 6:25 pm

    In an attosecond study of the H2 molecule physicists found that for light atomic nuclei -- as contained in most organic and biological molecules -- the correlation between electronic and nuclear motions cannot be ignored. […]

  • Course set to overcome mismatch between lab-designed nanomaterials and nature's complexity
    on April 16, 2018 at 4:43 pm

    Advances in nanotechnology have made it possible to control the size, shape, composition, elasticity and chemical properties of laboratory-made nanomaterials. Yet many of these materials do not to function as expected in the body. In new research, the team homes in on biomembranes -- the gatekeeping bilipid-layers and proteins surrounding cells. They explore the barriers a synthetic nanomaterial must breach to enter a cell and achieve its intended purpose. […]

  • Some superconductors can also carry currents of 'spin'
    on April 16, 2018 at 4:16 pm

    Researchers have shown that certain superconductors -- materials that carry electrical current with zero resistance at very low temperatures -- can also carry currents of 'spin'. The successful combination of superconductivity and spin could lead to a revolution in high-performance computing, by dramatically reducing energy consumption. […]

  • Researchers have placed an electron in a dual state -- neither freed nor bound -- thus confirming a...
    on April 16, 2018 at 4:15 pm

    Half a century ago, Walter Henneberger wondered if it was possible to free an electron from its atom, but still make it stay around the nucleus. Scientists considered it was impossible. For the first time, physicists have managed to control the shape of the laser pulse to keep an electron both free and bound to its nucleus, and were at the same time able to regulate the electronic structure of this atom. […]

  • Scientists uncover how to stop cyber intrusions
    on April 16, 2018 at 4:15 pm

    Researchers have found a proverbial smoking gun signature of the long sought-after Majorana particle, and the find, they say, could block intruders on sensitive communication networks. […]

  • Individual impurity atoms detectable in graphene
    on April 13, 2018 at 6:46 pm

    Physicists have succeeded in using atomic force microscopy to clearly obtain images of individual impurity atoms in graphene ribbons. Thanks to the forces measured in the graphene's two-dimensional carbon lattice, they were able to identify boron and nitrogen for the first time. […]

  • When superconductivity disappears in the core of a quantum tube
    on April 13, 2018 at 5:36 pm

    Predicting the behavior of electrons in a material is not easily done. Physicists have replaced the electrons with ultra-cold neutral lithium atoms that they had circulated in a one-dimensional quantum tube. The scientists were able to confirm an unusual state of matter that retains its insulation regardless of the level of attraction between the particles. This work opens the way to new materials with atypical properties. […]

  • Quantum physicists achieve entanglement record
    on April 13, 2018 at 3:06 pm

    Entanglement is of central importance for the new quantum technologies of the 21st century. A research team is now presenting the largest entangled quantum register of individually controllable systems to date, consisting of a total of 20 quantum bits. The physicists are pushing experimental and theoretical methods to the limits of what is currently possible. […]

  • Wiggling atoms switch the electric polarization of crystals
    on April 12, 2018 at 7:44 pm

    A time-resolved x-ray experiment now elucidates that tiny atomic vibrations shift negative charges over a 1000 times larger distance between atoms and switch the macroscopic polarization on a time scale of a millionth of a millionth of a second. […]