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Journal of Magnetism and Magnetic Materials

Monte Carlo investigation of dynamic properties of the quantum Ising spin glass in a transverse field

G. Büttner, Klaus D. Usadel

Published Feb 1, 1992• 1 citation
Publisher
DOI
10.1016/0304-8853(92)91472-6

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The infinite-range Ising spin-glass in the presence of a transverse field is studied by Monte Carlo simulations. The overlap probability distribution P ( q ) is defined and calculated for the present quantum case. The P ( q ) in the spin-glass phase has a long tail extended down to q = 0 qualitatively similar to the classical Sherrington-Kirkpatrick model. The phase boundary of the glass transition temperature vs. the transverse field is obtained. Our results for the phase diagram agree with our recent replica symmetry-breaking solution but disagree with the results of Yokata and of Ray et al.