Quantum critical dynamics in the presence of disorder

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Quantum phase transitions are abrupt qualitative changes of a system's groundstate occurring only at exactly zero temperature. Such critical points - although never reachable in their vicinity strongly impact many physical properties, even at comparably high temperatures. In fact, properties of many exotic materials are now linked to quantum phase transitions and these are studied intensely. Magnetic insulators make excellent model systems for such studies, as it is often possible to induce quantum phase...
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