Instabilities in the quantum Sherrington-Kirkpatrick Ising spin glass in transverse and longitudinal fields
- 1 June 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 39 (16) , 12418-12421
- https://doi.org/10.1103/physrevb.39.12418
Abstract
The infinite-range quantum Ising spin glass in transverse () and longitudinal () fields is studied by means of thermo-field-dynamics as a substitute for the -replica trick. With the use of a one-loop approximation for the dynamic self-interaction the stability of the mean-field-type solution against the action of fluctuations is investigated in the parameter space ().
Keywords
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