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    Category Physics

    Viability of Quantum Satellite Communications

    June 7, 2017, Categories  Physics, Technology/Electronics, Environment/Geology

    Flight paths for the 7km arc and line, followed from left to right. The star indicates the location of the ground station at Smith Falls{Montague Airport. The inner portions represent where the quantum link was active. Photo produced using GPSVisualizer.com, map data c 2016 Google, imagery c 2016 Cnes/Spot Image, DigitalGlobe, Landsat, New York GIS, USDA Farm Service Agency.

    Flight paths for the 7km arc and line, followed from left to right. The star indicates the location of the ground station at Smith Falls{Montague Airport. The inner portions represent where the quantum link was active. Photo produced using GPSVisualizer.com, map data c 2016 Google, imagery c 2016 Cnes/Spot Image, DigitalGlobe, Landsat, New York GIS, USDA Farm Service Agency.

    Researchers in Canada have taken a significant step towards enabling secure quantum communication via moving satellites, as announced by the Canadian Government in April 2017. Their study demonstrates the first quantum key distribution transmissions from a ground transmitter to a quantum payload on a moving aircraft...

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    Engineer Unveils new spin on Future of Transistors with Novel Design

    June 5, 2017, Categories  Physics, Chemistry/Nanotechnology

    All-carbon spin logic gate. Figure 1 Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRL determine the magnetic fields B and GNR edge magnetization, and thus the magnitude of the output current IGNR.

    All-carbon spin logic gate.  Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRL determine the magnetic fields B and GNR edge magnetization, and thus the magnitude of the output current IGNR.

    All-carbon spin logic gate. Magnetoresistive GNR unzipped from carbon nanotube and controlled by two parallel CNTs on an insulating material above a metallic gate. As all voltages are held constant, all currents are unidirectional. The magnitudes and relative directions of the input CNT control currents ICTRLdetermine the magnetic fields B and GNR edge magnetization, and ...

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    ‘Scrambled light’ Wavemeter Breakthrough

    June 5, 2017, Categories  Physics, Technology/Electronics

    Wavemeter setup: (a) Laser light is delivered into an integrating sphere (S) of diameter Dsphere, via an angled single mode fibre (SMF), where it undergoes numerous scattering events. A camera (C) located at a distance L from the integrating sphere observation port captures the speckle patterns. A wavemeter or Fabry–Perot interferometer (REF) is used to benchmark the speckle wavemeter. (b) An example of a speckle pattern captured by the camera at a wavelength of 780 nm with an image size of 512 × 512 pixels (with individual pixels of 4.5 × 4.5 μm2). The white scale bar denotes 200 pixels, and the colour bar shows the intensity in normalized units.

    Wavemeter setup: (a) Laser light is delivered into an integrating sphere (S) of diameter Dsphere, via an angled single mode fibre (SMF), where it undergoes numerous scattering events. A camera (C) located at a distance L from the integrating sphere observation port captures the speckle patterns. A wavemeter or Fabry–Perot interferometer (REF) is used to benchmark the speckle wavemeter. (b) An example of a speckle pattern captured by the camera at a wavelength of 780 nm with an image size of 512 × 512 pixels (with individual pixels of 4.5 × 4.5 μm2). The white scale bar denotes 200 pixels, and the colour bar shows the intensity in normalized units.

    A breakthrough innovation in the measurement of lasers can measure changes one millionth of the size of an atom and could revolutionize...

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    Takeoff and cruise: Toyota making ‘Flying Car,’ Luxury Boat (Update)

    June 4, 2017, Categories  Physics, Technology/Electronics

    1. Tsubasa Nakamura, project leader of Cartivator, second from left, watches the flight of the test model of the flying car on a former school ground in Toyota, central Japan, Saturday, June 3, 2017. Cartivator Resource Management, in which Toyota invested 42.5 million yen ($386,000), showed to reporters Saturday a test flight of a concoction of aluminum framing and propellers. It took off several times, hovering at eye level for a few seconds, before falling to the ground. (AP Photo/Koji Ueda) 2. This undated artist rendering released by Cartivator shows a flying car Cartivator plans to develop in the future. Cartivator Resource Management, in which Toyota invested 42.5 million yen ($386,000), showed to reporters Saturday, June 3, 2017, a test flight of a concoction of aluminum framing and propellers in Toyota, central Japan. It took off several times, hovering as high as eye level for a few seconds, before falling to the ground. Cartivator's goal is to deliver seamless transition from driving to flight so a tiny car can fly and light the Olympic torch in the 2020 games, according to project leader Tsubasa Nakamura. (Cartivator via AP) 3, In this May 26, 2017, photo, staff operate a Lexus luxury concept "yacht," in Tokyo Bay. With a streamlined curvaceous design, inspired by a dolphin and as evocative of a Lexus car, it's being promised as a commercial product in the next few years. (AP Photo/Eugene Hoshiko)

    1. Tsubasa Nakamura, project leader of Cartivator, second from left, watches the flight of the test model of the flying car on a former school ground in Toyota, central Japan, Saturday, June 3, 2017. Cartivator Resource Management, in which Toyota invested 42.5 million yen ($386,000), showed to reporters Saturday a test flight of a concoction of aluminum framing and propellers. It took off several times, hovering at eye level for a few seconds, before falling to the ground. (AP Photo/Koji Ueda)
    2. This undated artist rendering released by Cartivator shows a flying car Cartivator plans to develop in the future. Cartivator Resource Management, in which Toyota invested 42...

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