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Apr. 4, 2023 —绝对零度不能达到——除非你有an infinite amount of energy or an infinite amount of time. Scientists in Vienna (Austria) studying the connection between thermodynamics and ...
May 26, 2023 —The absolute internal quantum efficiency (IQE) of indium gallium nitride (InGaN) based blue light-emitting diodes (LEDs) at low temperatures is often assumed to be 100%. However, a new study has ...
Sep. 22, 2022 —Cooling materials to extremely low temperatures is important for basic physics research as well as for technological applications. By improving a special refrigerator and a low-temperature ...
May 6, 2022 —A theoretical study shows that long-range entanglement can indeed survive at temperatures above absolute zero, if the correct conditions are ...
Sep. 16, 2020 —In everyday life, measuring temperature is pretty straightforward. But in the quantum world, which deals with the super small and the ultra-cold, determining how hot or cold something is starts to ...
Aug. 26, 2022 —Physicists have built a quantum scale heat pump made from particles of light. This device brings scientists closer to the quantum limit of measuring radio frequency signals, useful in for example the ...
Feb. 2, 2022 —Researchers have succeeded in forming a control loop consisting of two quantum systems separated by a distance of one meter. Within this loop, one quantum system -- a vibrating membrane -- is cooled ...
May 25, 2023 —Scientists have developed a nanodevice that can measure the absolute power of microwave radiation down to the femtowatt level at ultra-low temperatures -- a scale trillion times lower than routinely ...
July 29, 2021 —By combining quantum theory and thermodynamics, it is possible to design a new kind of atomic refrigerator, which can cool down extremely cold Bose-Einstein-condensates even ...
Dec. 23, 2020 —Theoretical physicists have developed mathematical formulas that describe a physical phenomenon happening within quantum dots and other nanosized materials. The formulas could be applied to further ...