News tagged with physical review letters

Upper limit found for quantum world

The quantum world and our world of perception obey different natural laws. Leiden physicists search for the border between both worlds. Now they suggest an upper limit in a study reported in Physical Review Letters.

dateFeb 24, 2016 in Quantum Physics
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Measuring time without a clock

EPFL scientists have been able to measure the ultrashort time delay in electron photoemission without using a clock. The discovery has important implications for fundamental research and cutting-edge technology.

dateFeb 08, 2017 in General Physics
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The thermodynamics of learning

(—While investigating how efficiently the brain can learn new information, physicists have found that, at the neuronal level, learning efficiency is ultimately limited by the laws of thermodynamics—the same principles ...

dateFeb 06, 2017 in General Physics feature
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