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Atoms at negative absolute temperature are the hottest systems in the world

Researchers have created an atomic gas in the laboratory that nonetheless has negative Kelvin values. These negative absolute temperatures have several apparently absurd consequences: although the atoms in the gas attract each other and give rise to a negative pressure, the gas does not collapse - a behaviour that is also postulated for dark energy in cosmology.

Jan 4th, 2013

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Besser als Diamant

Physiker der Universität Würzburg haben Siliziumkarbid-Kristalle so verändert, dass sie neue, überraschende Eigenschaften zeigen. Das macht sie interessant für den Bau leistungsfähiger Computer oder für die Datenübertragung.

Jan 3rd, 2013

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