Quantum Physics

Quantum Physics News -- ScienceDaily News on quantum physics. Read current research on everything from quantum mechanics to quantum dots. Was Albert Einstein right?

  • Gyroscopes lead scientists to unusual state of matter in a disorganized structure
    on January 15, 2018 at 5:05 pm

    You don't have to be perfectly organized to pull off a wave, according to scientists. Using a set of gyroscopes linked together, physicists explored the behavior of a material whose structure is arranged randomly, instead of an orderly lattice. They found they could set off one-way ripples around the edges, much like spectators in a sports arena -- a 'topological wave,' characteristic of a particularly unusual state of matter. […]

  • Quantum leap: Computational approach launches new paradigm in electronic structure theory
    on January 12, 2018 at 6:29 pm

    A group of researchers specializing in quantum calculations has proposed a radically new computational approach to solving the complex many-particle Schrödinger equation, which holds the key to explaining the motion of electrons in atoms and molecules. […]

  • Pulses of light to encrypt data and protect security of cryptocurrencies
    on January 11, 2018 at 7:10 pm

    Data travels through thousands of miles of fiber optic cables underneath the world's oceans -- via pulses of light. And according to experts, the data in these cables is at great risk of being intercepted. However, a newly designed frequency comb might be an effective tool for data encryption. […]

  • Quantum Dot: Extremely bright and fast light emission
    on January 10, 2018 at 6:14 pm

    A type of quantum dot that has been intensively studied in recent years can reproduce light in every color and is very bright. An international research team has now discovered why this is the case. The quantum dots could someday be used in light-emitting diodes. […]

  • Surprising result shocks scientists studying spin
    on January 8, 2018 at 5:16 pm

    Scientists analyzing results of spinning protons striking different sized atomic nuclei at the Relativistic Heavy Ion Collider (RHIC) found an odd directional preference in the production of neutrons that switches sides as the size of the nuclei increases. The results offer new insight into the mechanisms affecting particle production in these collisions. […]

  • Quantum 'spooky action at a distance' becoming practical
    on January 6, 2018 at 3:40 pm

    Scientists have overcome a major challenge in applying a strange quantum effect to real applications. […]

  • Leaving Flatland: Quantum Hall effect physics in 4-D
    on January 4, 2018 at 5:41 pm

    Researchers have implemented a dynamical version of the four-dimensional quantum Hall effect with ultracold atoms in an optical superlattice potential. […]

  • Four-dimensional physics in two dimensions
    on January 3, 2018 at 6:27 pm

    For the first time, physicists have built a two-dimensional experimental system that allows them to study the physical properties of materials theorized to exist only in four-dimensional space. An international team of researchers demonstrated that the behavior of particles of light can be made to match predictions about the four-dimensional version of the 'quantum Hall effect' -- a phenomenon at the root of three Nobel Prizes in physics -- in a two-dimensional array of 'waveguides.' […]

  • 'Quantum radio' may aid communications and mapping indoors, underground and underwater
    on January 2, 2018 at 8:32 pm

    Researchers have demonstrated that quantum physics might enable communications and mapping in locations where GPS and ordinary cellphones and radios don't work reliably or even at all, such as indoors, in urban canyons, underwater and underground. […]

  • Tweaking quantum dots powers-up double-pane solar windows
    on January 2, 2018 at 6:48 pm

    Researchers are creating double-pane solar windows that generate electricity with greater efficiency and also create shading and insulation. It's all made possible by a new window architecture which utilizes two different layers of low-cost quantum dots tuned to absorb different parts of the solar spectrum. The approach complements existing photovoltaic technology by adding high-efficiency sunlight collectors to existing solar panels or integrating them as semitransparent windows into a building's architecture. […]

  • Locating the precise reaction path: Methane dissociation on platinum
    on January 2, 2018 at 4:42 pm

    So far, the search for catalysts even better than transition metals has been largely based on trial and error, and on the assumption that catalyzed reactions take place on step edges and other atomic defect sites of the metal crystals. An international research team has combined experiments using advanced infrared techniques with quantum theory to explore methane dissociation reactions in minute detail. […]

  • Low-altitude skiing can slow down aging -- relativistically
    on December 27, 2017 at 8:04 pm

    A doctor could tell you that skiing and running will most likely slow down aging. But how could mathematicians and physicists give their scientific support to this point of view? […]

  • Quantum noise reduction method for enhanced precision in atomic clocks
    on December 22, 2017 at 4:14 pm

    Finding ways to reduce quantum noise can enhance the precision of measurement in atomic fountain clocks or in methods used for quantum information processing. Physicists are now investigating ways of improving the analysis of quantum noise measurement in the case of spectroscopic investigations. […]

  • Exploring the phenomenon of superconductivity
    on December 22, 2017 at 2:25 pm

    Using ultracold atoms, researchers have found an exotic state of matter where the constituent particles pair up when limited to two dimensions. The findings from the field of quantum physics may hold important clues to intriguing phenomena of superconductivity. […]

  • The origin of water's unusual properties found
    on December 21, 2017 at 7:30 pm

    Using x-ray lasers, researchers have been able to map out how water fluctuates between two different states when it is cooled. At -44°C these fluctuations reach a maximum pointing to the fact that water can exist as two different distinct liquids. […]

  • Quantum coupling
    on December 21, 2017 at 5:27 pm

    Physicists have linked atoms and superconductors in a key step towards new hardware for quantum computers and networks. […]

  • A particle like slow light
    on December 21, 2017 at 3:58 pm

    Weyl particles are not particles which can move on their own (like electrons or protons), they only exist as 'quasiparticles' within a solid material. Now, for the first time, such Weyl particles have been found in a special kind of material, which is particularly interesting for novel technological applications: scientists have measured Weyl fermions in a material with highly correlated electrons. Surprisingly, these fermions move very slowly, despite having no mass. […]

  • Valleytronics route towards reversible computer
    on December 21, 2017 at 3:14 pm

    Researchers have discovered a new route towards novel reversible computer by fusing the concepts of valleytronics with digital information processing. […]

  • Using the dark side of excitons for quantum computing
    on December 20, 2017 at 5:20 pm

    A dark exciton can store information in its spin state, analogous to how a regular, classical bit stores information in its off or on state, but dark excitons do not emit light, making it hard to determine their spins and use them for quantum information processing. In new experiments, however, researchers can read the spin states of dark excitons, and do it more efficiently than before. […]

  • Technique makes NMR more useful for nanomaterials, exotic matter research
    on December 19, 2017 at 6:32 pm

    Researchers show how nuclear magnetic resonance probes can be optimized for studying the properties of nanomaterials and strange states of matter. […]

  • New type of quantum material
    on December 19, 2017 at 4:19 pm

    Physicists searching for an explanation for high-temperature superconductivity were surprised when their theoretical model pointed to the existence of a never-before-seen material in a different realm of physics -- that of topological quantum materials. […]

  • Quantum trick blocks background 'chatter' in sensing devices
    on December 19, 2017 at 2:13 pm

    A new protocol has solved a common problem in quantum sensing devices, which should enable a new generation of ultra-sensitive sensors with application in medical imaging and defense. […]

  • 'Quantum material' has shark-like ability to detect small electrical signals
    on December 18, 2017 at 8:17 pm

    A 'quantum material' that mimics a shark's ability to detect the minute electric fields of small prey has been shown to perform well in ocean-like conditions, with potential applications from defense to marine biology. […]

  • Getting under graphite’s skin: method of layering metals with 2D material may lead to new...
    on December 17, 2017 at 12:39 pm

    Scientists have discovered a new process to sheathe metal under a single layer of graphite which may lead to new and better-controlled properties for these types of materials. […]

  • Easier paths to quantum-based techology
    on December 15, 2017 at 7:57 pm

    Engineers have shown that a widely used method of detecting single photons can also count the presence of at least four photons at a time. The researchers say this discovery will unlock new capabilities in physics labs working in quantum information science around the world, while providing easier paths to developing quantum-based technologies. […]

  • Real-time observation of collective quantum modes
    on December 15, 2017 at 4:16 pm

    When symmetries in quantum systems are spontaneously broken, the collective excitation modes change in characteristic ways. Researchers have now directly observed such Goldstone and Higgs modes for the first time. […]

  • Complete design of a silicon quantum computer chip unveiled
    on December 15, 2017 at 2:44 pm

    Research teams all over the world are exploring different ways to design a working computing chip that can integrate quantum interactions. Now, engineers believe they have cracked the problem, reimagining the silicon microprocessors we know to create a complete design for a quantum computer chip that can be manufactured using mostly standard industry processes and components. […]

  • Superradiance of an ensemble of nuclei excited by a free electron laser
    on December 15, 2017 at 2:44 pm

    Scientists have succeeded in verifying a basic prediction of the quantum-mechanical behavior of resonant systems. They were able to carefully follow, one x-ray at a time, the decay of nuclei in a perfect crystal after excitation with a flash of x-rays. They observed a dramatic reduction of the time taken to emit the first x-ray as the number of x-rays increased. […]

  • An ultradilute quantum liquid made from ultra-cold atoms
    on December 14, 2017 at 7:08 pm

    Researchers have created a novel type of liquid one hundred million times more dilute than water and one million times thinner than air. The experiments exploit a fascinating quantum effect to produce droplets of this exotic phase of matter. […]

  • Doing without dark energy
    on December 14, 2017 at 3:08 pm

    Three mathematicians have a different explanation for the accelerating expansion of the universe that does without theories of 'dark energy.' Einstein's original equations for General Relativity actually predict cosmic acceleration due to an 'instability,' they argue in a new paper. […]