RSS Quantum Physics / Mechanics

  • Physicists propose a second level of quantization for quantum Shannon theory May 22, 2019
    Information theory, which was developed by Claude Shannon starting in the late 1940s, deals with questions such as how quickly information can be sent over a noisy communications channel. Both the information carriers (e.g., photons) and the channel (e.g., optical fiber cable) are assumed to be classical systems, with well-defined, perfectly distinguishable states.
  • Quantum interferometry reveals the chosen pathway of coherent phonon generation May 22, 2019
    Scientists at Tokyo Institute of Technology and Keio University investigated the excitation and detection of photogenerated coherent phonons in polar semiconductor GaAs through an ultrafast dual pump-probe laser for quantum interferometry.
  • Quantum communication: making two from one May 21, 2019
    In the future, quantum physics could become the guarantor of secure information technology. To achieve this, individual particles of light—photons—are used for secure transmission of data. Findings by physicists from the Max Planck Institute for Solid State Research could play a key role. The researchers accidentally came across a light source that generates a photon […]
  • A method to determine magnon coherence in solid-state devices May 21, 2019
    A team of researchers at Utrecht University, the Norwegian University of Science and Technology and the University of Konstanz has recently proposed a new method to determine magnon coherence in solid-state devices. Their study, outlined in a paper published in Physical Review Letters , shows that cross-correlations of pure spin currents injected by a ferromagnet […]
  • New Josephson junction study links quantum theory to experiment May 21, 2019
    The Josephson junction is one of the most important elements in turning quantum phenomena into usable technology.
  • Scientists develop polariton nano-laser operating at room temperature May 20, 2019
    A room temperature polariton nano-laser has been demonstrated, along with several related research findings, regarding topics such as polariton physics at the nanoscale and also applications in quantum information systems. The research was published in the journal, Science Advances.
  • Quantum cloud computing with self-check May 20, 2019
    With a quantum coprocessor in the cloud, physicists from Innsbruck, Austria, open the door to the simulation of previously unsolvable problems in chemistry, materials research or high-energy physics. The research groups led by Rainer Blatt and Peter Zoller report in the journal Nature how they simulated particle physics phenomena on 20 quantum bits and how […]
  • Manipulating atoms one at a time with an electron beam May 17, 2019
    The ultimate degree of control for engineering would be the ability to create and manipulate materials at the most basic level, fabricating devices atom by atom with precise control.
  • Single molecule magnet used as a scanning magnetometer May 17, 2019
    A team of researchers from the University of California and Fudan University has developed a way to use a single molecule magnet as a scanning magnetometer. In their paper published in the journal Science, the group outlines their research which involved demonstrating their sensor scanning the spin and magnetic properties of a molecule embedded in […]
  • Exploring the scientific potential of the ATLAS Experiment at the High-Luminosity LHC May 17, 2019
    The High-Luminosity upgrade of the Large Hadron Collider (HL-LHC) is scheduled to begin colliding protons in 2026. This major improvement to CERN's flagship accelerator will increase the total number of collisions in the ATLAS experiment by a factor of 10. To cope with this increase, ATLAS is preparing a complex series of upgrades including the […]