01. New tech delivers high-tech film that blocks electromagnetic interference 02. One step closer to complex quantum teleportation 03. ‘Folded’ optical devices manipulate light in a new way 04. Physicists design new antenna for next-generation super-sensitive magnetometers 05. Tests show integrated quantum chip operations possible 06. Using a crystal to link visible light to infrared opens a window on 07. How to Encode a Secret Message in a Fingerprint 08. Quantum predictions 09. Chinese New Mini Robot Carries Micro Intelligent Missiles 10. A new approach to liquid-repelling surfaces And others… China Air Pollution fight is the current biggest global environmental […]
Using a crystal to link visible light to infrared opens a window on infrared sensing
Phys. org November 1, 2018 Researchers in Singapore have developed a method that allows changes in the infrared beam to be analyzed via the visible beam, it provides more information than conventional spectroscopy. They fed laser light into a lithium niobate crystal that split some of the laser photons into two quantum-linked photons of lower energies through parametric down-conversion, one in the infrared, and one in the visible parts of the spectrum. When the original laser beam re-entered the crystal, it created a new pair of down-converted beams that interfered with the light created in the first pass. A sample […]
Tests show integrated quantum chip operations possible
Phys.org October 30, 2018 An international team of researchers (Australia, the Netherlands, Japan, USA – industry) has demonstrated an integrated device platform incorporating a silicon metal-oxide-semiconductor double quantum dot that is capable of single-spin addressing and control via electron spin resonance, combined with high-fidelity spin readout in the singlet-triplet basis. They have shown that they can combine this with a special type of quantum readout process known as Pauli spin blockade, a key requirement for quantum error correcting codes that will be necessary to ensure accuracy in large spin-based quantum computers. The new integrated design can be manufactured using well-established […]
RNA microchips
Phys.org November 6, 2018 An international team of researchers (Austria, Canada) has developed a new synthetic approach that allows RNA to be chemically synthesized about a million times more efficiently than previously possible. They adapted the photolithographic fabrication technology from the semiconductor chip industry for the chemical synthesis of RNA. Biological photolithography makes it possible to produce RNA chips with a density of up to one million sequences per square centimeter. Instead of using far ultraviolet light, which is used in the production of computer chips silicon etching and doping, the researchers use UV-A light. The combination of high-synthesis yield and […]
Quantum predictions
Phys.org November 2, 2018 To more fully understand and harness properties of complex materials such as vanadium dioxide a team of researchers in the US (Oak Ridge National Laboratory, Argonne National Laboratory, Sandia National Laboratories, Lawrence Livermore National Laboratory, the University of California, Berkeley, North Carolina State University) is using the Quantum Monte Carlo method which accounts for the individual behavior of all of the electrons without major approximations, reducing systematic errors in simulations and producing reliable results. The team has built open-source software, known as QMCPACK, that is now available online and on all the DOE Office of Science […]
Quantum on the edge: Light shines on new pathway for quantum technology (w/video)
Phys.org November 1, 2018 To unleash the potential of quantum technology, scientists need to find a way to protect the entangled superposition of qubits at the nanoscale. An international team of researchers (Australia, Israel) developed a novel lattice structure of silicon nanowires, creating a particular symmetry that provides unusual robustness to the photons’ correlation. Robustness stems from the underlying topology. Waveguides made using silicon nanowires were lined up in pairs with a deliberate defect in symmetry through the middle, creating two lattice structures with different topologies and an intervening ‘edge’. This topology allows for the creation of special modes in […]
Physicists design new antenna for next-generation super-sensitive magnetometers
Phys.org November 6, 2018 Ensembles of nitrogen-vacancy color centers in diamond hold promise for ultra-precise magnetometery, competing with superconducting quantum interference device detectors. By utilizing the advantages of dielectric materials, such as very low losses for electromagnetic field, with the potential for creating high-quality factor resonators with strong concentration of the field within it, researchers in Russia implemented a dielectric resonator antenna for coherent manipulation of a large ensemble of nitrogen-vacancy centers in diamond. Research enables use of large volume low nitrogen-vacancy concentration diamond plates in modern nitrogen-vacancy magnetometers thus improving sensitivity via larger coherence time and higher optical detected […]
One step closer to complex quantum teleportation
Science Daily November 2, 2018 Researchers in Austria are pursuing a new path to increase the information capacity of complex quantum systems – instead of just increasing the number of particles involved, the complexity of each system is increased. By using a computer algorithm Melvin that autonomously searches for an experimental implementation, they entangled three photons beyond the conventional two-dimensional nature using quantum systems which have more than two possible states — in this particular case, the angular momentum of individual light particles. The individual photons now have a higher information capacity than QuBits. The developed methods and technologies could […]
New tech delivers high-tech film that blocks electromagnetic interference
Science Daily November 1, 2018 An international team of researchers (USA – New York University, Drexel University, Yale University, China) has developed and demonstrated spin spray layer‐by‐layer (SSLbL) technique to rapidly assemble Ti3C2Tx MXene‐carbon nanotube composite films for EMI shielding. The technique allows strategic combinations of nanostructured materials and polymers providing a rich platform for developing hierarchical architehttps://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201803360ctures with desirable cross‐functionalities including controllable transparency, thickness, and conductivity, as well as high stability and flexibility. They demonstrated that the films show high conductivities up to 130 S cm−1 and high specific shielding effectiveness up to 58 187 dB cm2 g−1 and […]
A new approach to liquid-repelling surfaces
MIT News November 1, 2018 Omniphobic surfaces can fail during condensation. Researchers at MIT have developed a nanostructured surface that consists of isolated reentrant cavities with a pitch on the order of 100 nm to prevent droplets from nucleating and spreading within all structures. They developed a model to guide surface design and subsequently fabricated and tested these surfaces with various liquids. They demonstrated repellency to 10 °C below the dew point and showed durability over 3 weeks. The work provides important insights for achieving robust, omniphobic surfaces…read more. TECHNICAL ARTICLE