A tiny shift in quantum energy levels usually associated with individual atoms has been seen in a solid for the first time by physicists in Switzerland and Canada. The team spotted the Lamb shift in a ...

Sound measurement: artist's impression of polarons in a BEC. (Courtesy: Markus Oberthaler) The tiny influence that quantized sound waves called phonons have on atomic energy levels has been measured ...

In a new study published in Science today, JILA and NIST (National Institute of Standards and Technology) Fellow Jun Ye and his research team have taken a significant step in understanding the ...

Atoms of antimatter and matter are perfect mirror images, even when weird quantum phenomena come into play. The energy levels of antihydrogen atoms — the antimatter opposites of hydrogen atoms — are ...

Willis Lamb, who died on 15 May aged 94, received his highest recognition in 1955, when he was awarded one half of the Nobel Prize in Physics for his discovery of the subtle quantum-mechanical shift ...