Quantum Physics

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TWISTED MESSAGE  A radar tower at the Central Institute for Meteorology and Geodynamics in Vienna was used to beam photons imparted with a twist to a detector three kilometers away.

tiny semiconductor particles

DAZZLING DOTS  Tiny semiconductor particles called quantum dots light up mouse intestines in this microscope image. Red and green represent proteins illuminated by fluorescing quantum dots. Cell nuclei are stained blue with a traditional dye not involving quantum dots.

strontium atomic clock

RIGHT ON TIME  A new atomic clock contains two ultrasensitive thermometers (center) that enable scientists to account for heat-caused fluctuations that limit the clock’s precision.

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