Hysteresis in a quantum spin model

Banerjee, Varsha ; Dattagupta, Sushanta ; Sen, Parongama (1995) Hysteresis in a quantum spin model Physical Review E, 52 (2). pp. 1436-1446. ISSN 1063-651X

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Official URL: http://pre.aps.org/abstract/PRE/v52/i2/p1436_1

Related URL: http://dx.doi.org/10.1103/PhysRevE.52.1436


We study the hysteresis effects in an Ising system in an external field rotating in the transverse plane, the latter introducing nontrivial quantum effects. The rate equations for the components of magnetization are derived in the mean field approximation by using a microscopic system-plus-reservoir approach. The area of the hysteresis loop is obtained by solving these equations numerically, and its scaling behavior with respect to temperature (T) and strength of the external field (Γ) is studied.

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