Ising spin glasses in a transverse field exhibit a zero temperature quantum phase transition, which is driven by quantum rather than thermal fluctuations. They constitute a universality class that is significantly different from the classical, thermal phase transitions. Most interestingly close to the transition in finite dimensions a quantum Griffiths phase leads to drastic consequences for various physical quantities: for instance diverging magnetic susceptibilities are observable over a whole range of transverse field values in the disordered phase.
CITATION STYLE
Inoue, J.-I. (2005). Quantum Spin Glasses Quantum Annealing, and Probabilistic Information Processing (pp. 259–297). https://doi.org/10.1007/11526216_10
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