Quantum phase transitions take place at 0 K - that is, without the help of thermal fluctuations. A theory that describes how such transitions behave at higher temperatures has just been vindicated by Anne Kinross of McMaster University and her collaborators. Martin Klanjšek of the Jožef Stefan Institute in Ljubljana explains the experiment's significance.
A Critical Test of Quantum Criticality
Theoretically predicted quantum critical behavior in a model magnetic material has been experimentally confirmed at a quantitative level.
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