Science News

New analysis approach could help boost sensitivity of large telescopes

Researchers developed a way to use radio-holography to characterize a fully integrated cryogenic telescope instrument prior to deployment. To place the telescope optics in the tester, the optics tube enters the cryostat from below where it is secured in place. Then, the entire cryostat is flipped so that the window points upwards. Credit: Grace Chesmore, …

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Whispering gallery modes with fractional optical angular momentum in photonic crystal micro-rings

The left side depicts the concept of half-integer angular momentum in the author’s work. The electric field inside the resonator (middle) depends on both the field envelope phase (top) and the angular momentum phase (bottom), each of which requires two round trips to return to its original value. Light carrying half-integer angular momentum can be …

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A new satellite has become one of the 20 brightest stars in the sky

Enlarge / Observation of a BlueWalker 3 pass from Oukaimeden Observatory on Nov. 16 2022. The bright star lower left is Zeta Puppis. CLEOsat/Oukaimeden Observatory/IAU CPS/AE Kaeouach Last month, a Texas-based company announced that it had successfully deployed the largest-ever commercial communications satellite in low-Earth orbit. This BlueWalker 3 demonstration satellite measures nearly 65 square …

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How quantum optics illuminates the nature of the quark

Schematic illustration of a holonomy. Scientists from the University of Rostock, Germany were able to recreate fundamental physical properties from the realm of elementary particle physics in a photonic system. The results are published in Nature Physics. In their fundamental research, experimental physicists routinely bring giant yet intricate machinery to bear: Particle accelerators of enormous …

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Discovery of a novel quantum state analogous to water that won’t freeze

Cryostat used to achieve temperatures down to 20 millikelvin. Credit: HZDR/Jürgen Jeibmann Water that simply will not freeze, no matter how cold it gets—a research group involving the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) has discovered a quantum state that could be described in this way. Experts from the Institute of Solid State Physics at the University of …

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